Listening to this guy is a genuine pleasure. Not only the content but the delivery is top notch. No boring stuff, no excess nerd humor, a little irony.. all is nicely spoken. Wonderful content. Also he speaks with absolute clarity in terms of understanding by non english language native people. Amazing.
I have spent 56+ minutes suspended in a state of superposition of both, understanding and not understanding Sean Carrolls lecture. And yet I have enjoyed it immensely and consider it a time well spent. Somewhere in a multiverse of possibilities I am ready to receive my honorary quantum mechanics degree. No, wait... the cat is actually asleep.
I started a few years ago binge watching Carrol lectures, I take several week breaks and then I rewatch, after awhile I began to accumulate an understanding, so keep listening, the quest for clarity is rewarding❤️
@@greggrant4614 I looked. The cat is dead of cyanid poisoning. But wait! Maybe he's only pretending. And about what I got out of this lecture as far as knowing who's on first, second or third.
Thank goodness for RUclips. I can stop Sean's lecture, look up words, and replay the last section. If I had been sitting in the audience I would have been totally lost. The quantum world is a wonderful mystery!
Outstanding. I love when people are great speakers. A good lecturer can keep you interested, get you laughing here and there, but a great energetic speaker with a great voice carries you along on a wave of modulation - this man is that.
I was so afraid when I saw the title, that I would not understand one bit of this - but it was explained so great and with so much enthusiasm and clearness, that even a Humanities scholar of Very Little Brain and with English as second language like me could follow (and, of course, love it). Thank you, Royal Institution, and thank you very much, Sean Carroll!
To me, it looks like Sean is reaching a mature pedagogical perfection in Quantum lectures! It is always a great service for students, researchers, and seekers to see and hear lucid talks like these. Thanks and looking forward to the progress of the theory.
As much as I think many worlds isn't right, I love his attitude. He isn't sugarcoating the problem, he's attacking it head on. Nobody knows how quantum mechanics works, and we'll never know how gravity interacts with particles until we understand quantum mechanics, at least better than we do now.
That's exactly how I feel about Sean Caroll. Many worlds is difficult to stomach and also pushes the problem beyond what is almost certainly the limits of ever being tested/falsified. But his attitude and openness about the embarrassing state the field of quantum mechanics finds itself in, is refreshing and desperately needed. Otherwise, theoretical physicist might as well start calling themselves technicians/engineers. And instead of insisting that particles at the quantum mechanical level are "weird" or "odd", just say they're "magic". It's what many of the explanations amount to anyway...
@@chronic_cynic Notwithstanding your misgivings, it is the simplest description that comes out of the Schrodinger equation. Anything else is just adding more of the unexplainable and thus further complicates the problem. Sean Caroll does an adequate job of explaining only what can be observed, as simply as possible, and doesn't make assumptions, which is what other quantum interpretations tend to do (aka magic).
@Hlafordlaes There is a different solution which is simply that the different branches of the universal wavefunction don't have an equal "weight" or "width". Say that there's an electron which we predict will have a 50/50 chance of either being measured as spin up or spin down if we run an experiment on it. According to the many worlds interpretation, if we do the measurement there will be a branch of the universal wavefunction where the electron is spin up and we observed it to be spin up and a branch of the universal wavefunction where the electron is spin down and we observed it to be spin down. However, each of those branches will only have 50% of the "width" or "weight" (or however you want to conceptualize it) of the original branch which the two new "worlds" branched from. In fact, it is exactly this width of the resulting branches predicted by the Schrödinger equation which (in the Many Worlds interpretation) creates the appearance that quantum mechanics is intrinsically stochastic. If in a different experiment we predict that the chances of measuring a particle as spin up are 80% and spin down only 20% that just means that the corresponding branches of the universal wavefunction will have a width of 80% and 20% of the branch which they themselves branched from. This works out mathematically and it doesn't violate any conservation laws. If it did then this whole idea would have already been dismissed long ago. Edit: I want to add something to reply to the claim or "misgiving" that Many Worlds is untestable or unscientific. It is strictly speaking true that there's no way to directly empirically demonstrate that there are other branches of the universal wavefunction which are just as real as the one that we happen to find ourselves on. Well, seems like this is just a philosophical matter which science doesn't have much to say about, right? Wrong. If we have a description of physics which has held up to all attempts of falsification as well as Schrödinger's equation has then we have very firm reason to take any predictions made by that description seriously, whether we can directly verify those predictions or not. The point is that Schrödinger's equation actually *predicts* Many Worlds and, as Everett showed, it can also account for the fact that we never directly observe anything in a superposition *entirely on its own,* without any collapse of the wavefunction when you make a quantum measurement. What all the other interpretations of quantum mechanics do is simply *adding stuff* to our fundamental description of reality *in order to get rid* of the Many Worlds predicted by the Schrödinger equation. This becomes especially problematic when we add vaguely defined concepts such as "observer" into our fundamental description of reality as is the case in the Copenhagen interpretation. Ultimately, the Many Worlds interpretation is just what you get when you apply Occam's razor to quantum mechanics. It may superficially seem like you're adding a lot to your picture of reality by allowing for all these different worlds, but actually you're making *much fewer* assumptions while still accounting for all the observable phenomena AND also providing an explanation for the (apparent) stochastic nature of quantum mechanics.
This is way beyond my expectation ! Best lecture on this topic I have ever learned. I am so grateful to find this lecture. Allow me to express my highest respect to you Prof. Carroll.
Sean Carroll is back! Edit: Just found time to watch this amazing science communicator return to the RI (this time without his wife). The talk has forever changed the way I think about quantum mechanics and the universe. A very memorable talk that tempts me into buying his new book "Something Deeply Hidden". I thought it was such a bold move by Prof. Carroll; to take these quantum mechanical "interpretations" and make them 'theories'. Its exactly what this field of science needs right now. Creating new theories based from entanglement and getting people to stop using classical mechanics as a starting point would forever change physics. Thanks again to the RI for bringing back Sean Carroll for another insightful lecture!
It is amazing how again and again he is able to shine this light of knowledge and understanding on a subject so complex, yet through his knowledge and ability to compartmentalize pieces of information, giving the audience a sense of understanding of something otherwise well beyond it's reach! Amazing.
Just a reminder, Sean has a podcast on RUclips called Mindscape. He talks about everything from wine, conciousness, end of the universe to physics. Still, much of it is physics.
This is actually the first presentation I've seen on it but thats cause I'm just now getting into the field today and im only a 14 year old high school freshman.
I agree. Is there a name for this theory? I get plenty of articles when I search for entanglement determined spacetime, but is there a name? Who came up with it?
@@Wander4P A friend majored in physics once told me that the theory related to something called 'holographic entropy'. But I don't know anything more about it, you can search for this topic.
yes, and I would love to hear my most beloved god-walking-in-the-skin-of-a-man Roger Penrose think on that ....and comment in real time ! .....(Perhaps he has already ). But It has been very fun to hear Sean Carroll talk with so much enthusiam for the whole history of this stuff. Great fun !
I sat in on a couple of lectures of his “General Relativity” class at the University of Chicago in the Autumn Quarter of 2001. Left after the math got too heavy for me (a Divinity School grad student at the time). He was very kind and allowed me not only to sit in on his lectures but even answered wild questions I would ask him as the physics students would all sit there wondering who the hell this crazy guy (that would be me) was. Great to hear this lecture. I’ll bet he’s still one of the nicest geniuses you’ll ever meet.
@@rayagoldendropofsun397 borrowing from Naval Ravaikant quote, "It is the mark of a genius to explain a complex topic in a simple way." The genius in Sean Carroll is derived from how he breaks down these concepts to all audiences. An audience comprising of non physics majors, physics students and professors. He can use a complex language when speaking to say a group of particle physics or cosmologists or natural philosophers on one hand and shift to speak in a different plain language to people like me who did physics in high school seamlessly. The physics and mathematics of what he speaks depending on his audiences are consistent despite speaking the concepts using different choice of words and language to his respective audiences. Ever wondered why his books are full of equations (as at the time of writing this comment he has 2 books on Space, Time and Motion & Quanta and Fields. Best selling books despite them having hundreds of equations.) That's his mark of a genius which is a relative concept. Relative in the sense of say Galileo Galilei, Einstein Genius who where thought experiment thinkers. So each level of genius is unique to their own.
I like the way he says the last third will be incomprehensible to most of us, but then gives us completely comprehensible arguments. A good salesman will always make his buyers feel great about themselves.
I'm not a scientist either but this field is one of a good ride And I am new to the field i'm only a 14 year old highschool freshman but my inspiration and desire of science has made me consider being a scientist and being a professor on this field.
I have never seen a hop to the left executed with such scientific fervor! I love Sean Carroll....all the different ones in all the different universes!
Quantum Entangled Twisted Tubules: When we draw a sine wave on a blackboard, we are representing spatial curvature. Does a photon transfer spatial curvature from one location to another? Wrap a piece of wire around a pencil and it can produce a 3D coil of wire, much like a spring. When viewed from the side it can look like a two-dimensional sine wave. You could coil the wire with either a right-hand twist, or with a left-hand twist. Could Planck's Constant be proportional to the twist cycles. A photon with a higher frequency has more energy. (More spatial curvature). What if gluons are actually made up of these twisted tubes which become entangled with other tubes to produce quarks. (In the same way twisted electrical extension cords can become entangled.) Therefore, the gluons are actually a part of the quarks. Mesons are made up of two entangled tubes (Quarks/Gluons), while protons and neutrons would be made up of three entangled tubes. (Quarks/Gluons) The "Color Force" would be related to the XYZ coordinates (orientation) of entanglement. "Asymptotic Freedom", and "flux tubes" make sense based on this concept. Neutrinos would be made up of a twisted torus (like a twisted donut) within this model. Gravity is a result of a very small curvature imbalance within atoms. (This is why the force of gravity is so small.) Instead of attempting to explain matter as "particles", this concept attempts to explain matter more in the manner of our current understanding of the space-time curvature of gravity.
@@petergianakopoulos4926 I'd be willing to be a student of Carroll's I really care for this field I'm a beginner and newbie to this field. Watching these lectures is a helpful to understanding it I really want to be a scientist and professor on this field some day
I love the brilliance of Sean Carroll and how clear he can explain theories. Sean Carroll's explanations will enable me to get as close to understanding quantum mechanics as I ever will. Thank you for this very interesting lecture!
This is one of my favorite videos ever. Really convinced me both that the Many-Worlds interpretation is a good way of thinking about the universe, and also that trying to interpret quantum mechanics is philosophically important.
One problem I always struggle with in the multiverse theory is the sheer number of universes that would need to exist. There are uncountable quantum interactions every moment and to think that every time the number of universes would double. It’s beyond comprehension for me.
Brilliant job! I did a little physics study in college years ago and still I am thrilled to hear the latest report on subjects like this. Sean is fun to listen to more than once. I have watched this one twice.
First time I've actually been explained to on how you arrive at Many Worlds, this is a really excellent lecture on the current state of quantum theory for the (educated) layman. I can't enthuse enough about how clearly and methodically you're taken through the description of the arguments, so you're just ahead of his conclusions and cry "oh yes of course!" just before he comes out with it.
I don’t know about anyone else but the last part was my favorite :-) what I think is so interesting is the idea that empty space is not empty. I know Lawrence Krauss has talked about this before but it’s a real mind bender and I can’t wait to see what comes from the next decade of research into this area.
Such a humble guy, and such a gifted lecturer. Who would think he was the one sent forth on this earth to shake the foundations of modern physics? He didn't invent Many Worlds or QFT, but he's the one putting the pieces together in a way that makes sense, and he's rattling the cages of the complacent. What a gift to science!
Why electromagnetism is BS? The theory states that the electromagnetic waves propagate in vacuum space at 3 x 10^8 m/s. The fact is there is no electric and magnetic force carrier that exists in the vacuum space, therefore it is impossible producing any waves. The theory states that the current flows back and forth in the antenna can produce EM waves. The fact is an antenna is a terminal of an electrical circuit, not a closed circuit, it is impossible to have current flows back and forth. The theory states that the conductors carry free electrons. The fact is free electrons will flow to positively charged nuclear first due to the super-strong electrostatic attraction force. If there are free electrons in conductors, they will discharge into nuclear and destroy the atoms.
This was artfully done. I'll be honest and say that the many worlds interpretation does sound so incomprehensibly big to me that I kinda subconsciously don't take it very seriously. So when he talked about how it came about using a different name for it, I was able to get on board a little more. Then the Trojan horse opened up, and I was stunned a little. Seriously, one of my favorite moments in a good while. It was a better plot twist than any movie I've ever seen, and many times as impactful
Thanks for the talk. So with time, size gets thinner according to wave function square, and since we can't interact with other universes, "total" energy in our universe decreases. Can we measure this?
Thank you, Prof. Carroll! I really appreciate how you discuss and pinpoint everything about quantum mechanics. It's not a mystery, It's not magic, it's just science! GBY!
Great lecture. I've always felt uncomfortable to admit that I really don't understand quantum mechanics, especially as I have a degree in Mathematical Physics! So thank you Sean Carroll, I'm beginning to get some understanding now!
There's "understanding" and there's "understanding". When they say "no one understands it", they really mean the fundamental foundations of it. The day to day stuff can be understood by side stepping the pop-science retelling of it (i.e. the "spookiness", quantum "weirdness" etc).
Quantum Entangled Twisted Tubules: When we draw a sine wave on a blackboard, we are representing spatial curvature. Does a photon transfer spatial curvature from one location to another? Wrap a piece of wire around a pencil and it can produce a 3D coil of wire, much like a spring. When viewed from the side it can look like a two-dimensional sine wave. You could coil the wire with either a right-hand twist, or with a left-hand twist. Could Planck's Constant be proportional to the twist cycles. A photon with a higher frequency has more energy. (More spatial curvature). What if gluons are actually made up of these twisted tubes which become entangled with other tubes to produce quarks. (In the same way twisted electrical extension cords can become entangled.) Therefore, the gluons are actually a part of the quarks. Mesons are made up of two entangled tubes (Quarks/Gluons), while protons and neutrons would be made up of three entangled tubes. (Quarks/Gluons) The "Color Force" would be related to the XYZ coordinates (orientation) of entanglement. "Asymptotic Freedom", and "flux tubes" make sense based on this concept. Neutrinos would be made up of a twisted torus (like a twisted donut) within this model. Gravity is a result of a very small curvature imbalance within atoms. (This is why the force of gravity is so small.) Instead of attempting to explain matter as "particles", this concept attempts to explain matter more in the manner of our current understanding of the space-time curvature of gravity.
"If you think you understand quantum mechanics, you don't understand quantum mechanics." - Feynman Feynman won his 1965 Nobel Prize in Physics for his work in quantum electrodynamics,
Well, I'm about to make it less understandable - even to Sean, with his "many-worlds", should he read this, by posing a stumper. Many-worlds, Bohm, Copenhagen: those are all accounts of "Measurement Theory". In quantum theory, by von Neumann's account, there are two postulates: Evolution, which says that a quantum state evolves in time, as given by the Schroedinger Equation; and Projection, which says that a "projection" occurs at specific points in space and time - those points corresponding to measurements. (Whether the place of measurement has to be staffed by anyone, or can be done without anyone at the switch is a separate issue, but not important for *my* question). The purpose of Measurement Theory is to try and provide some account of and formulation for the Projection Postulate. There are two separate accounts of quantum theory, called "Pictures"; the above postulates and just about everything (and everyone else) are all in the Schroedinger Picture. In it, a state evolves in time, and the variables describing a system are timeless operators that applied to the state to get (generally time-dependent) values. It is in the Schroedinger Picture that the many-worlds "splits" are framed in terms of. In the Schroedinger Picture, moreover, time is cast as an arena of "happenings" - an "historical" time. The other picture is the Heisenberg Picture. It, too, has its own version of the Evolution Postulate - taking the form of the Heisenberg Equation. In it, states are *timeless* and the variables describing a system have time-dependence. The time-dependence, in contrast to the Schroedinger Picture, however, is on the same footing as spatial-dependence, so that time in the Heisenberg Picture is on the same footing as space; and the Heisenberg Picture's view of time is as something that is "all there" -- which is the same way that Relativity sees time. Here's the stumper: the "well-known" equivalence between the Schroedinger and Heisenberg Pictures pertains *only* to the Evolution Postulate! There's no equivalence for the Projection Postulate, because ... there's no Projection Postulate in the Heisenberg Picture! None that is well-known and has received consensus acceptance. In fact, there's no Measurement Theory in the Heisenberg Picture at all! There have been few attempts to formulate one; but (again) nothing that's received wide acceptance. So ... if "many worlds" is all true and correct, then what's the Heisenberg Picture version of it? States don't split in the Heisenberg Picture, because they're timeless. There's no historical time in that picture at all. So, what's splitting? So, clearly, Sean (and quite a few others) are not getting the whole picture right; and their accounts of quantum theory are incomplete. There's a huge gap: the No-Measurement-Theory-In-The-Heisenberg-Picture Gap.
feynman himself said ;" if someone says they understand QM, their a liar, and if someone says i dont understand QM at all, that means they understand a little bit"
Superb!!! I've been telling people about this for a while, and now it is nice to see it coming in such a straightforward way from an authoritative source.
I took my car to a quantum mechanic. It’s currently in an indeterminate state, but worse - it’s being so in numerous other branches of the multiverse. I shudder to think of the sheer accumulated entropy of the eventual bill.
@@philipmelton7182 Functionally, yes. I'm industrial and I can tell you I could not digest the mathematical descriptions of most of QM any better than most people.
That's what I hate from Engineers. They wasted 14 years of time & brain to just have a job in a factory, I'm not against engineering as they shaped the world we enjoy and take for granted, but like Sr Nikola Tesla, he was a keen learner of mathematics & physics. I believe, Engineers are the practical side of a physicist but too much engaged with COMMERCE. BTW I'm 17yrs old and took Science Stream at XI for Aerospace Engineering but I always want to go for research line but since they're paid less where they shouldn't be like that, need to have a capital to start my own with a renowned institute research on many parts of Physics, Chemistry, Information Tech. (of course) & Mathematics.
@@shubhankardasgupta4777 Indeed engineers learn to solve problems with an empirical process. While research scientists are or should be thinking about the cutting edge. You could be an engineer who continues to take an interest in the cutting edge and when you have gained experience contribute to ground breaking work. Do you follow Thunderfoot? He is a scientist, his RUclips often explore areas overlooked by other researchers, he also is skilled in glasswork and general problem solving. I get the impression he is often called upon by various researchers to solve some technical issue in their cutting edge machines. Sounds like he has the best of both worlds.
Well the point of quantum mechanic's theory is that no one does. It's like his fox story. No one trying to find out anymore so just left that and teaching fairytale to students. He actualy trying to understand what is happening that's why you think you understand something. He dosent understand it either but trying to do so and feels like is closer than anyone else. For me listening to him i start bealive that real physicists actually still exist.
@@lurker668 there is no point, quantum mechanics is just not intuitive because we evolved to understand the macro world not the micro, but that doesn't mean you can't understand it, it just doesn't feel right, but that is irrelevant.
another great lecture that's gonna take a few watches over next few days but haven't found anyone who explains it as well as yourself, thanks for always breaking my brain ha
Every time a cow farts, it creates billions of universes. Who knew? In a cosmos where everything happens, nothing happens. Think about it. Saying multiverse is a fact is highly misleading. You assume materialism, dream up multiverse with not a shred of evidence for it, and voila, the quantum measurement problem is solved.
2 issues with this theory 1. Either the splits don’t require an intelligent observer which means Everything will become infinitely thin, meaning, there is no thickness, meaning worlds cannot / are not created Or 2. The splits require an intelligent observer which provides VERY compelling scientific reasoning for the existence of a God
@@JayneCobb88 World remains embedded in an infinite intelligence everywhere/all the time whether you call it God or not, there is no way any laws of Physics can work without this intelligence embedded everywhere, all the time. Irrespective of world being universe or multi-verse. Also, an omni-present, all powerful God cannot exist outside of Universe, existing outside of Universe makes it tiny/not-present-everywhere/nor-capable of controlling everything at once, in fact God becomes redundant in that case. All such attributes require God to be infinite and one with the Universe (so same or super-set) or whatever exists. You are that God, everything is that God, that God alone exists (Upanishads).
That's why Schrödinger said dead or alive cat, not asleep. Because it's only going to ruin the thought experiment and remain in a state of superposition 9 times, then it'll work thereafter.
@@Piplodocus That's why he said he added sleeping gas, as Schrödinger added Cyanide gas. Both would 100% take effect, as we all know what a cat is like awake and active. They are predators. The idea of both taking effect, gas or not gas, it shows a super position. And we end at square one which is what he wants to avoid, and did his on going theory by explaining what could be. I enjoy this.
My brain is too fossilised to be able to comprehend much of the content, but I still enjoyed this presentation. Entertaining, and informative. Thank you, RI and Dr Carroll.
without quantum mechanic theory, there is no semiconductor and without semiconductor there will be nothing as a modern world. The miracle of Quantum theory.
@@abhishekac1881 Here in America, we have a phrase that goes, "The stuff dreams are made of" to indicate wishful thinking. The fact that quantum physics is mainly based on equations and theories, yet explains the existence of all matter in the universe makes the reversal of this common phrase humorous.
I was in a super position where my brain both hurts and doesn't hurt, but then I became entangled with the environment. So, when you open the box, you will find me and my brain already hurts, because Dr. Carroll was in my environment lol Thank you Ri, for another great video. peace
🙃This is one of the wonderful lectures about 'reality' available to all on the internet. How lucky we are! We don't even need to be matriculated at Cambridge U to be privy to it. Thank you Mr. Carroll and to all those others responsible for making this [and I might add other great lectures available on the internet] to everyone who wants to be more excited about the universe.
Thank you very much , Sean , a fascinating and almost comprehensible lecture . What possibilities this could open for our species . But , an urgent request from an old guy who has been following this subject all his life . Will you please BLOODY GET ON WITH IT , as I am desperate to know the answer before I croak .
As Mr. Charles Miller puts it: "The best lecture on this topic I've ever heard! Thank you Dr. Carroll. I envy your students!". Yes, if I had Dr. Carroll to be my quantum mechanics professor back 60 years ago......
From what little I gathered, and from what fraction of that I could comprehend in some sort of mabey sorta correct or not way, it's like 3 dimensional space is a "simulation." When playing a 3D game, objects aren't "litterally" seperated but their seperation, or virtual space itself, is a result of mathematical equations. Only OUR space is defined by vibrations which translate and interact in such a way as to "simulate" space from a sentient perspective. For the record I have barely any idea what i've just said.
A true physicist is the most open-minded person you are ever going to meet. Both in their professional and philosophical outlook and also in their libertarian and social disposition. You have to be of this personality (open to change) if you ever want to progress in this field of mankind's endeavor.
@@GiggleBlizzard That you feign illiteracy means you cannot just point at people and use words to demean them. You understand none of the words you used nor their meaning as a sentence if you do not understand the words I used. Any words you use, while feigning illiteracy, are meaningless. Hope you get better. Try asking what I am on about instead of deciding that I munst be A, B, or C because you don't know what I mean.
Fantastic. Relived the frustrating experience of having to shut up and just accept quantum mechanics/Copenhagen interpretation when I was 19 at Berkeley (1980’s). Love Sean Carroll’s intelligence.
its been over 100 years since we discovered the quantum world and the more we try to get to the bottom of it the more incomprehesible we find it. I think we shoud just accept it as it is
Am I the only person who is not unsettled by the repercussions of the multi world theory?! In fact, it brings some level of comfort to think that there are parallel universes that are much better than ours. I don’t know but it feels very poetic to me.
Question Sean, what if the fact that what we are observing when uranium decays are fields at their highest possible energy state, hence why they behave as if they are particles, but they are in fact the electron fields moving through space and are merely compressed by the energy state?
Thank you for this fantastic lecture! I have listened to everything RUclips has to say about Quantum Mechanics but this was by far the easiest to comprehend for a lay person.. I still like the Copenhagen Interpretation the most.
This was amazing. It summed up the reading I've been doing over the past few months and filled in a few key gaps due to the excellent explanation. I'm so inspired by this research and wish we could fast forward a few years like Sean said to see a fuller picture of how quantum mechanics may describe our existence. 👏
Wow. It's been a long time since I've listened to Sean Carroll. This lecture by far is one of the best I have heard on this subject. Dr. Carroll presents an intriguing and fascinating picture of the problems with understanding quantum mechanics. Just might buy his book!
If you like Dr. Carroll, I’d recommend his podcast Mindcape (www.preposterousuniverse.com/podcast/2018/07/02/welcome-to-the-mindscape-podcast/). He interviews other very interesting people and one gets to learn a lot.
Such a beautiful theory and explanation, the harmony of an idea such as entanglement truly gives me goose-bumps. There is gold in the hills of this frontier, so I am confident that many will come to explore, map, and dig.
Wow! not sure how I came about your video here but I watched it start to finish and was fascinated! Thank you for such a brilliant lecture!! ♥️ No uni student here but found this fascinating and a great description / understanding of such a complex science, kudos!! 🙌🙌
Hi Sean Here's a simple question for you. If gravity waves propagate across the universe at the speed of light for unlimited distances, doesn't that mean space it's self is a medium of some substance? I compare the gravity wave to an ocean wave. In the ocean, waves are created by several different methods. Some are wind generated some are tide generated and some are earthquake generated. The biggest are created by displacement of underwater tectonic plates during earthquakes. A landslide on the shore that slides into the ocean can make large waves too. A gravity wave generated by merging neutron stars or black holes or other similar displacement/merger events creates gravity waves that spread out thorough space just like water waves. Wouldn't that suggest SPACE is a substance that is more than a void? What allows a gravity wave to propagate over vast distances if it wasn't moving through a material that supported the waves movement. In a water wave the water doesn't actually travel any real distance, it just moves locally and the energy keeps moving through it farther from the source. Gravity works the same way in "SPACE". People keep looking for gravity to be a mater of mass of objects when it's the displacement of SPACE the object sits in. Your looking for gravity where the light is better and it's far from the light you are using. That's my understanding, gravity, it's not a quantizable force. Art
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Listening to this guy is a genuine pleasure. Not only the content but the delivery is top notch. No boring stuff, no excess nerd humor, a little irony.. all is nicely spoken. Wonderful content. Also he speaks with absolute clarity in terms of understanding by non english language native people. Amazing.
❤
I have spent 56+ minutes suspended in a state of superposition of both, understanding and not understanding Sean Carrolls lecture.
And yet I have enjoyed it immensely and consider it a time well spent.
Somewhere in a multiverse of possibilities I am ready to receive my honorary quantum mechanics degree.
No, wait... the cat is actually asleep.
I started a few years ago binge watching Carrol lectures, I take several week breaks and then I rewatch, after awhile I began to accumulate an understanding, so keep listening, the quest for clarity is rewarding❤️
How do know if the cat is actually asleep without looking in the box - did you remote view it somehow?
@@greggrant4614 I looked. The cat is dead of cyanid poisoning. But wait! Maybe he's only pretending. And about what I got out of this lecture as far as knowing who's on first, second or third.
The line (me) is forming behind you
@@dandavis4469 me (1)
Thank goodness for RUclips. I can stop Sean's lecture, look up words, and replay the last section. If I had been sitting in the audience I would have been totally lost. The quantum world is a wonderful mystery!
Outstanding. I love when people are great speakers. A good lecturer can keep you interested, get you laughing here and there, but a great energetic speaker with a great voice carries you along on a wave of modulation - this man is that.
I now have "wave of modulation" to the tune of Wave of Mutilation in my head.
Can you hum it for me! 😂 @@jjwhittle8873
I was so afraid when I saw the title, that I would not understand one bit of this - but it was explained so great and with so much enthusiasm and clearness, that even a Humanities scholar of Very Little Brain and with English as second language like me could follow (and, of course, love it). Thank you, Royal Institution, and thank you very much, Sean Carroll!
Thank you. I took undergraduate and graduate classes in quantum mechanics and NO ONE ever explained it as succinctly as you have.
To me, it looks like Sean is reaching a mature pedagogical perfection in Quantum lectures! It is always a great service for students, researchers, and seekers to see and hear lucid talks like these. Thanks and looking forward to the progress of the theory.
Glad you found it lucid. I'm now switching to women's triple jump.
The cat was drowsy
Bob I I
You're good at words
@@Velopter q
As much as I think many worlds isn't right, I love his attitude. He isn't sugarcoating the problem, he's attacking it head on. Nobody knows how quantum mechanics works, and we'll never know how gravity interacts with particles until we understand quantum mechanics, at least better than we do now.
That's exactly how I feel about Sean Caroll. Many worlds is difficult to stomach and also pushes the problem beyond what is almost certainly the limits of ever being tested/falsified. But his attitude and openness about the embarrassing state the field of quantum mechanics finds itself in, is refreshing and desperately needed. Otherwise, theoretical physicist might as well start calling themselves technicians/engineers. And instead of insisting that particles at the quantum mechanical level are "weird" or "odd", just say they're "magic". It's what many of the explanations amount to anyway...
@@chronic_cynic Notwithstanding your misgivings, it is the simplest description that comes out of the Schrodinger equation. Anything else is just adding more of the unexplainable and thus further complicates the problem. Sean Caroll does an adequate job of explaining only what can be observed, as simply as possible, and doesn't make assumptions, which is what other quantum interpretations tend to do (aka magic).
@Hlafordlaes Matter and energy only have to be conserved in each of the unique universes. Thus, no physics laws violated.
@Hlafordlaes There is a different solution which is simply that the different branches of the universal wavefunction don't have an equal "weight" or "width". Say that there's an electron which we predict will have a 50/50 chance of either being measured as spin up or spin down if we run an experiment on it. According to the many worlds interpretation, if we do the measurement there will be a branch of the universal wavefunction where the electron is spin up and we observed it to be spin up and a branch of the universal wavefunction where the electron is spin down and we observed it to be spin down. However, each of those branches will only have 50% of the "width" or "weight" (or however you want to conceptualize it) of the original branch which the two new "worlds" branched from. In fact, it is exactly this width of the resulting branches predicted by the Schrödinger equation which (in the Many Worlds interpretation) creates the appearance that quantum mechanics is intrinsically stochastic. If in a different experiment we predict that the chances of measuring a particle as spin up are 80% and spin down only 20% that just means that the corresponding branches of the universal wavefunction will have a width of 80% and 20% of the branch which they themselves branched from.
This works out mathematically and it doesn't violate any conservation laws. If it did then this whole idea would have already been dismissed long ago.
Edit:
I want to add something to reply to the claim or "misgiving" that Many Worlds is untestable or unscientific. It is strictly speaking true that there's no way to directly empirically demonstrate that there are other branches of the universal wavefunction which are just as real as the one that we happen to find ourselves on. Well, seems like this is just a philosophical matter which science doesn't have much to say about, right? Wrong. If we have a description of physics which has held up to all attempts of falsification as well as Schrödinger's equation has then we have very firm reason to take any predictions made by that description seriously, whether we can directly verify those predictions or not. The point is that Schrödinger's equation actually *predicts* Many Worlds and, as Everett showed, it can also account for the fact that we never directly observe anything in a superposition *entirely on its own,* without any collapse of the wavefunction when you make a quantum measurement. What all the other interpretations of quantum mechanics do is simply *adding stuff* to our fundamental description of reality *in order to get rid* of the Many Worlds predicted by the Schrödinger equation. This becomes especially problematic when we add vaguely defined concepts such as "observer" into our fundamental description of reality as is the case in the Copenhagen interpretation.
Ultimately, the Many Worlds interpretation is just what you get when you apply Occam's razor to quantum mechanics. It may superficially seem like you're adding a lot to your picture of reality by allowing for all these different worlds, but actually you're making *much fewer* assumptions while still accounting for all the observable phenomena AND also providing an explanation for the (apparent) stochastic nature of quantum mechanics.
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Thanks
This is way beyond my expectation ! Best lecture on this topic I have ever learned. I am so grateful to find this lecture. Allow me to express my highest respect to you Prof. Carroll.
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I'm not here for the lecture. I'm here to support my parallel self who is here for the lecture.
You made me laugh ao hard
😂
this is my parallel self who is commenting.
😂 nice! refer to.. : 6:04
Wait, what!?
Sean Carroll is back!
Edit: Just found time to watch this amazing science communicator return to the RI (this time without his wife).
The talk has forever changed the way I think about quantum mechanics and the universe. A very memorable talk that tempts me into buying his new book "Something Deeply Hidden".
I thought it was such a bold move by Prof. Carroll; to take these quantum mechanical "interpretations" and make them 'theories'.
Its exactly what this field of science needs right now. Creating new theories based from entanglement and getting people to stop using classical mechanics as a starting point would forever change physics.
Thanks again to the RI for bringing back Sean Carroll for another insightful lecture!
Yea! I 'liked' the video without watching.
@@sarahlee9979 Oh right. Thanks for reminding me.
@@sarahlee9979 A pavlovian brainwashed person would do that.
Have you watched it yet?
Sean Carroll is a charlatan.
@@ZeroOskul what makes you say that?
It is amazing how again and again he is able to shine this light of knowledge and understanding on a subject so complex, yet through his knowledge and ability to compartmentalize pieces of information, giving the audience a sense of understanding of something otherwise well beyond it's reach! Amazing.
Is this the first cult you joined?
He is a paid shill
@@yasirpanezai5690 by whom and for what? Is there any validation for your conspiracy? This is science for science sake, I think
@@jwvandegronden he belongs to the scientific mafia that peddle pseudo science and make millions.
I have so many universes!
This guy is not as smart as he thinks.
He has a good sense of humor which keeps the topic interesting ...
Get a life
Just a reminder, Sean has a podcast on RUclips called Mindscape. He talks about everything from wine, conciousness, end of the universe to physics. Still, much of it is physics.
@Dirk Knight Funny. 4/10
Is this physics worldstar?
best comment!
Absolutely the best presentation I have seen on Quantam Mechanics anywhere in the past 20 years.
This is actually the first presentation I've seen on it but thats cause I'm just now getting into the field today and im only a 14 year old high school freshman.
The idea of linking quantum entanglement with spacetime-geometry/curvature is just so fascinating.
I agree. Is there a name for this theory? I get plenty of articles when I search for entanglement determined spacetime, but is there a name? Who came up with it?
@@Wander4P A friend majored in physics once told me that the theory related to something called 'holographic entropy'. But I don't know anything more about it, you can search for this topic.
yes, and I would love to hear my most beloved god-walking-in-the-skin-of-a-man Roger Penrose think on that ....and comment in real time ! .....(Perhaps he has already ). But It has been very fun to hear Sean Carroll talk with so much enthusiam for the whole history of this stuff. Great fun !
Maybe they can define a distance metric based on entanglement and link it to Minkowski or other metrics needed to derive the curvature of space-time.
I sat in on a couple of lectures of his “General Relativity” class at the University of Chicago in the Autumn Quarter of 2001. Left after the math got too heavy for me (a Divinity School grad student at the time). He was very kind and allowed me not only to sit in on his lectures but even answered wild questions I would ask him as the physics students would all sit there wondering who the hell this crazy guy (that would be me) was. Great to hear this lecture. I’ll bet he’s still one of the nicest geniuses you’ll ever meet.
What exactly makes him a genius ?
@@rayagoldendropofsun397 His innate disposition through which nature gives the rule to art
@alexausberlin
The basis here is about Science FACTs, can he be innate on Science FACT'S ?
@@rayagoldendropofsun397 borrowing from Naval Ravaikant quote, "It is the mark of a genius to explain a complex topic in a simple way."
The genius in Sean Carroll is derived from how he breaks down these concepts to all audiences. An audience comprising of non physics majors, physics students and professors. He can use a complex language when speaking to say a group of particle physics or cosmologists or natural philosophers on one hand and shift to speak in a different plain language to people like me who did physics in high school seamlessly. The physics and mathematics of what he speaks depending on his audiences are consistent despite speaking the concepts using different choice of words and language to his respective audiences.
Ever wondered why his books are full of equations (as at the time of writing this comment he has 2 books on Space, Time and Motion & Quanta and Fields. Best selling books despite them having hundreds of equations.)
That's his mark of a genius which is a relative concept. Relative in the sense of say Galileo Galilei, Einstein Genius who where thought experiment thinkers.
So each level of genius is unique to their own.
@michaelkahama3459
Sean Carroll has no Science FACT in Newton's Gravity nor Einstein's Space Bending.
U like his yapping ? That's fine !
I like the way he says the last third will be incomprehensible to most of us, but then gives us completely comprehensible arguments. A good salesman will always make his buyers feel great about themselves.
I am not a scientist but I love listening to this. My incomprehension of quantum mechanics seems so much clearer now.
I'm not a scientist either but this field is one of a good ride And I am new to the field i'm only a 14 year old highschool freshman but my inspiration and desire of science has made me consider being a scientist and being a professor on this field.
I have never seen a hop to the left executed with such scientific fervor! I love Sean Carroll....all the different ones in all the different universes!
I have learnt two things are true: Quantum Mechanics is not Mechanics, Software Engineering is not Engineering.
Quantum Entangled Twisted Tubules:
When we draw a sine wave on a blackboard, we are representing spatial curvature. Does a photon transfer spatial curvature from one location to another? Wrap a piece of wire around a pencil and it can produce a 3D coil of wire, much like a spring. When viewed from the side it can look like a two-dimensional sine wave. You could coil the wire with either a right-hand twist, or with a left-hand twist. Could Planck's Constant be proportional to the twist cycles. A photon with a higher frequency has more energy. (More spatial curvature). What if gluons are actually made up of these twisted tubes which become entangled with other tubes to produce quarks. (In the same way twisted electrical extension cords can become entangled.) Therefore, the gluons are actually a part of the quarks. Mesons are made up of two entangled tubes (Quarks/Gluons), while protons and neutrons would be made up of three entangled tubes. (Quarks/Gluons) The "Color Force" would be related to the XYZ coordinates (orientation) of entanglement. "Asymptotic Freedom", and "flux tubes" make sense based on this concept. Neutrinos would be made up of a twisted torus (like a twisted donut) within this model. Gravity is a result of a very small curvature imbalance within atoms. (This is why the force of gravity is so small.) Instead of attempting to explain matter as "particles", this concept attempts to explain matter more in the manner of our current understanding of the space-time curvature of gravity.
I must admit, I was hoping for a Rocky Horror-based joke after he did a hop to the left.
magical how he explains such difficult concepts to a layman like myself--thank you!
You're very welcome!
I won't remember any of this in the morning...but I still dig it.
Colchis 30000 just keep watching like I do lol
In another universe I remember everything. Too bad I'm stuck in this universe 😣
Gurd MLB at least y’all are entangled. You should be proud of your other self
I go "huh" half the time and also dig it! :D
@@SG-ig2eu theory of numbers
I wish I could have a professor like Dr Carroll he speaks so clearly
Professors wish they had better students
@@petergianakopoulos4926 I'd be willing to be a student of Carroll's I really care for this field I'm a beginner and newbie to this field. Watching these lectures is a helpful to understanding it I really want to be a scientist and professor on this field some day
Supporting all the great talks the RI hosts
I love the brilliance of Sean Carroll and how clear he can explain theories. Sean Carroll's explanations will enable me to get as close to understanding quantum mechanics as I ever will. Thank you for this very interesting lecture!
One of the best lectures I ever attended at the RI, Sean's a natural.
Too bad it's all just theory
I found it a good read as a beginner and newbie to this field.
I listen to this lecture every night to go to sleep, and have been for the past year. It's very comforting
Sean is the genius for explaining and teaching sophisticated issues!!!
God bless Him!!!
This is one of my favorite videos ever. Really convinced me both that the Many-Worlds interpretation is a good way of thinking about the universe, and also that trying to interpret quantum mechanics is philosophically important.
Most quantum physicists do not endorse the multiple/infinite universes theory...
@@smartcatcollarproject5699 veg god df
One problem I always struggle with in the multiverse theory is the sheer number of universes that would need to exist. There are uncountable quantum interactions every moment and to think that every time the number of universes would double. It’s beyond comprehension for me.
Brilliant job! I did a little physics study in college years ago and still I am thrilled to hear the latest report on subjects like this. Sean is fun to listen to more than once. I have watched this one twice.
It seems you did very little physics, indeed. ;-)
I too watched for the second time.
Yep@@schmetterling4477
First time I've actually been explained to on how you arrive at Many Worlds, this is a really excellent lecture on the current state of quantum theory for the (educated) layman. I can't enthuse enough about how clearly and methodically you're taken through the description of the arguments, so you're just ahead of his conclusions and cry "oh yes of course!" just before he comes out with it.
I don’t know about anyone else but the last part was my favorite :-) what I think is so interesting is the idea that empty space is not empty. I know Lawrence Krauss has talked about this before but it’s a real mind bender and I can’t wait to see what comes from the next decade of research into this area.
Such a humble guy, and such a gifted lecturer. Who would think he was the one sent forth on this earth to shake the foundations of modern physics? He didn't invent Many Worlds or QFT, but he's the one putting the pieces together in a way that makes sense, and he's rattling the cages of the complacent. What a gift to science!
In other words, he is selling horse manure and you bought it. ;-)
@@schmetterling4477 Use your correct orifice when you're speaking.
1: Hey, man, how're you?
2: Weird, I'm in a superposition.
3: Weird.
'Do you want a glass of wine or a glass of beer?'
'Yes'
@@LittrowTaurus or does he want a glass of glass
Why electromagnetism is BS?
The theory states that the electromagnetic waves propagate in vacuum space at 3 x 10^8 m/s. The fact is there is no electric and magnetic force carrier that exists in the vacuum space, therefore it is impossible producing any waves.
The theory states that the current flows back and forth in the antenna can produce EM waves. The fact is an antenna is a terminal of an electrical circuit, not a closed circuit, it is impossible to have current flows back and forth.
The theory states that the conductors carry free electrons. The fact is free electrons will flow to positively charged nuclear first due to the super-strong electrostatic attraction force. If there are free electrons in conductors, they will discharge into nuclear and destroy the atoms.
Comment of the decade !
A: lets go the the superposition bar.
B: but i swear, if someone looks at me im leaving!
This was artfully done. I'll be honest and say that the many worlds interpretation does sound so incomprehensibly big to me that I kinda subconsciously don't take it very seriously.
So when he talked about how it came about using a different name for it, I was able to get on board a little more.
Then the Trojan horse opened up, and I was stunned a little. Seriously, one of my favorite moments in a good while. It was a better plot twist than any movie I've ever seen, and many times as impactful
Thanks for the talk. So with time, size gets thinner according to wave function square, and since we can't interact with other universes, "total" energy in our universe decreases. Can we measure this?
The best lecture on this topic I've ever heard! Thank you Dr. Carroll. I envy your students!
You have been taken on a tour of La Puta.
I'm so jealous of his students!!! This topic is so good
Brilliant! Probably the best hour I have ever spent on RUclips.
Perfect lecture! Besides, his engligh is so clear that I could understand more than 90%! Thank you for sharing!
sean carroll...best we have today. the alan watts of physics!! as always, great post royal institution!!!
Couldn't of worded better myself
@@4toppingpizzayacaant72 A combination with xtra cheese please 😋
@@whirledpeas3477 lol.
"For those of you who where tortured by Chemistry classes as college students, you recognised these orbitals"
Really really felt that...
I always suspected that the chemistry teacher was making that sht up!
Thank you, Prof. Carroll! I really appreciate how you discuss and pinpoint everything about quantum mechanics. It's not a mystery, It's not magic, it's just science! GBY!
Great lecture. I've always felt uncomfortable to admit that I really don't understand quantum mechanics, especially as I have a degree in Mathematical Physics! So thank you Sean Carroll, I'm beginning to get some understanding now!
There's "understanding" and there's "understanding". When they say "no one understands it", they really mean the fundamental foundations of it. The day to day stuff can be understood by side stepping the pop-science retelling of it (i.e. the "spookiness", quantum "weirdness" etc).
Quantum Entangled Twisted Tubules:
When we draw a sine wave on a blackboard, we are representing spatial curvature. Does a photon transfer spatial curvature from one location to another? Wrap a piece of wire around a pencil and it can produce a 3D coil of wire, much like a spring. When viewed from the side it can look like a two-dimensional sine wave. You could coil the wire with either a right-hand twist, or with a left-hand twist. Could Planck's Constant be proportional to the twist cycles. A photon with a higher frequency has more energy. (More spatial curvature). What if gluons are actually made up of these twisted tubes which become entangled with other tubes to produce quarks. (In the same way twisted electrical extension cords can become entangled.) Therefore, the gluons are actually a part of the quarks. Mesons are made up of two entangled tubes (Quarks/Gluons), while protons and neutrons would be made up of three entangled tubes. (Quarks/Gluons) The "Color Force" would be related to the XYZ coordinates (orientation) of entanglement. "Asymptotic Freedom", and "flux tubes" make sense based on this concept. Neutrinos would be made up of a twisted torus (like a twisted donut) within this model. Gravity is a result of a very small curvature imbalance within atoms. (This is why the force of gravity is so small.) Instead of attempting to explain matter as "particles", this concept attempts to explain matter more in the manner of our current understanding of the space-time curvature of gravity.
"If you think you understand quantum mechanics, you don't understand quantum mechanics." - Feynman
Feynman won his 1965 Nobel Prize in Physics for his work in quantum electrodynamics,
Well, I'm about to make it less understandable - even to Sean, with his "many-worlds", should he read this, by posing a stumper. Many-worlds, Bohm, Copenhagen: those are all accounts of "Measurement Theory". In quantum theory, by von Neumann's account, there are two postulates: Evolution, which says that a quantum state evolves in time, as given by the Schroedinger Equation; and Projection, which says that a "projection" occurs at specific points in space and time - those points corresponding to measurements. (Whether the place of measurement has to be staffed by anyone, or can be done without anyone at the switch is a separate issue, but not important for *my* question). The purpose of Measurement Theory is to try and provide some account of and formulation for the Projection Postulate.
There are two separate accounts of quantum theory, called "Pictures"; the above postulates and just about everything (and everyone else) are all in the Schroedinger Picture. In it, a state evolves in time, and the variables describing a system are timeless operators that applied to the state to get (generally time-dependent) values. It is in the Schroedinger Picture that the many-worlds "splits" are framed in terms of. In the Schroedinger Picture, moreover, time is cast as an arena of "happenings" - an "historical" time.
The other picture is the Heisenberg Picture. It, too, has its own version of the Evolution Postulate - taking the form of the Heisenberg Equation. In it, states are *timeless* and the variables describing a system have time-dependence. The time-dependence, in contrast to the Schroedinger Picture, however, is on the same footing as spatial-dependence, so that time in the Heisenberg Picture is on the same footing as space; and the Heisenberg Picture's view of time is as something that is "all there" -- which is the same way that Relativity sees time.
Here's the stumper: the "well-known" equivalence between the Schroedinger and Heisenberg Pictures pertains *only* to the Evolution Postulate! There's no equivalence for the Projection Postulate, because ... there's no Projection Postulate in the Heisenberg Picture! None that is well-known and has received consensus acceptance.
In fact, there's no Measurement Theory in the Heisenberg Picture at all! There have been few attempts to formulate one; but (again) nothing that's received wide acceptance. So ... if "many worlds" is all true and correct, then what's the Heisenberg Picture version of it? States don't split in the Heisenberg Picture, because they're timeless. There's no historical time in that picture at all. So, what's splitting?
So, clearly, Sean (and quite a few others) are not getting the whole picture right; and their accounts of quantum theory are incomplete. There's a huge gap: the No-Measurement-Theory-In-The-Heisenberg-Picture Gap.
feynman himself said ;" if someone says they understand QM, their a liar, and if someone says i dont understand QM at all, that means they understand a little bit"
Superb!!! I've been telling people about this for a while, and now it is nice to see it coming in such a straightforward way from an authoritative source.
I took my car to a quantum mechanic. It’s currently in an indeterminate state, but worse - it’s being so in numerous other branches of the multiverse. I shudder to think of the sheer accumulated entropy of the eventual bill.
Very clearly described. As a layman engineer with an interest in physics, this is the clear description.
Are engineers lay people?
Except for gravity
@@philipmelton7182 Functionally, yes. I'm industrial and I can tell you I could not digest the mathematical descriptions of most of QM any better than most people.
That's what I hate from Engineers. They wasted 14 years of time & brain to just have a job in a factory, I'm not against engineering as they shaped the world we enjoy and take for granted, but like Sr Nikola Tesla, he was a keen learner of mathematics & physics. I believe, Engineers are the practical side of a physicist but too much engaged with COMMERCE.
BTW I'm 17yrs old and took Science Stream at XI for Aerospace Engineering but I always want to go for research line but since they're paid less where they shouldn't be like that, need to have a capital to start my own with a renowned institute research on many parts of Physics, Chemistry, Information Tech. (of course) & Mathematics.
@@shubhankardasgupta4777 Indeed engineers learn to solve problems with an empirical process. While research scientists are or should be thinking about the cutting edge.
You could be an engineer who continues to take an interest in the cutting edge and when you have gained experience contribute to ground breaking work.
Do you follow Thunderfoot? He is a scientist, his RUclips often explore areas overlooked by other researchers, he also is skilled in glasswork and general problem solving. I get the impression he is often called upon by various researchers to solve some technical issue in their cutting edge machines. Sounds like he has the best of both worlds.
Hi from the universe where he jumped right, just wanted to say hello, cheers
Always welcomed,thanks for jumping in.
No Name it just virtually happened to us too!
Ah. And you communicated to this universe how?
@@ZeroOskul Magic
please tell him to stop this "doing" of universes at each lecture... where do we get then? :)
This is a superb presentation. Sean Carroll is a master of making these subjects entertaining and accessible.
He makes me feel like I actually understand the subject. Feynman would be grinning from ear to ear!
Well the point of quantum mechanic's theory is that no one does. It's like his fox story. No one trying to find out anymore so just left that and teaching fairytale to students. He actualy trying to understand what is happening that's why you think you understand something. He dosent understand it either but trying to do so and feels like is closer than anyone else. For me listening to him i start bealive that real physicists actually still exist.
Wwewwewwwwwwwwwwww5wewwwewwwwweewwwwwwwwww5ewewwweew
@@lurker668 there is no point, quantum mechanics is just not intuitive because we evolved to understand the macro world not the micro, but that doesn't mean you can't understand it, it just doesn't feel right, but that is irrelevant.
Really? I thought he used unnessecary jargon and bad explanations. Idk if Feynman would like him at all
@@SuperMaDBrothers he needed to use jargon otherwise this would be a 4 hour video, but of course feynman would have explained it much clearer
What an amazing talk. Such a pleasure to watch it. I couldn’t enjoy more.
I would have enjoyed more, the truth. Ken Wheeler!
What an excellent lecture - on so many levels.
another great lecture that's gonna take a few watches over next few days but haven't found anyone who explains it as well as yourself, thanks for always breaking my brain ha
Einstein, if anything, is underrated -- love it!
Zenocrat einstein
was a fool...and he has been thoroughly debunked
einstein is a counterfeit, a fraud.
Luca Bernardini
Haha, very funny.
@@thattwodimensionalant4626 it's not a joke
Luca Bernardini
Nice sarcasm, haha.
In another multiverse, I actually understand what he's talking about!
In the parallel universe where I actually live, all the scientists were locked up in insane asylums gizzilian years ago (earth-time).
"'It's just a jump to the left."
And then a step to the righ-igh-ight.
time warp anyone?
Let's do it again.
And on a different universe this comment says:
"It's just a jump to the right."
@@samcarter8828 and where is the universe in that he says it's the "other left"? :)
New excuse for laziness: just trying to be more responsible with the number of worlds I am creating.
Not all heroes wear capes...
haha:-) nice excuse, you are God now, creator of worlds, Tat tvam Asi..
Every time a cow farts, it creates billions of universes. Who knew? In a cosmos where everything happens, nothing happens. Think about it. Saying multiverse is a fact is highly misleading. You assume materialism, dream up multiverse with not a shred of evidence for it, and voila, the quantum measurement problem is solved.
2 issues with this theory
1. Either the splits don’t require an intelligent observer which means Everything will become infinitely thin, meaning, there is no thickness, meaning worlds cannot / are not created
Or 2. The splits require an intelligent observer which provides VERY compelling scientific reasoning for the existence of a God
@@JayneCobb88 World remains embedded in an infinite intelligence everywhere/all the time whether you call it God or not, there is no way any laws of Physics can work without this intelligence embedded everywhere, all the time. Irrespective of world being universe or multi-verse.
Also, an omni-present, all powerful God cannot exist outside of Universe, existing outside of Universe makes it tiny/not-present-everywhere/nor-capable of controlling everything at once, in fact God becomes redundant in that case. All such attributes require God to be infinite and one with the Universe (so same or super-set) or whatever exists. You are that God, everything is that God, that God alone exists (Upanishads).
His voice is so amazing; I literally am hearing every word clearly.
Me too and I am half deaf.
The cat can be both asleep and awake at the same time.
Isn't that every cat?
he's onto something big here....
My cats are always asleep unless I say "dinner".
That's why Schrödinger said dead or alive cat, not asleep. Because it's only going to ruin the thought experiment and remain in a state of superposition 9 times, then it'll work thereafter.
@@Piplodocus That's why he said he added sleeping gas, as Schrödinger added Cyanide gas. Both would 100% take effect, as we all know what a cat is like awake and active. They are predators. The idea of both taking effect, gas or not gas, it shows a super position. And we end at square one which is what he wants to avoid, and did his on going theory by explaining what could be. I enjoy this.
Ph
Simply fabulous and a really lucid example of testing thinking skills before reaching a scientific conclusion. I'm buying the book!!
This was the most understandable overview of quantum mechanics I have listened to.
The best presentation of Quantum Mechanics that I have seen so far. Thank you for posting!
Love these 1 hour talks. At the end I can string half a sentence together to make myself look smart, in company that is smarter than myself.
Sean Carroll is arguably my favourite physicist. So nice to listen to.
Him and brian greene ❤️
Sean Carroll is such an excellent speaker. I enjoy all of his lectures.
The speaker is phenomenal. What a gift to be brilliant and be able to speak so well
My brain is too fossilised to be able to comprehend much of the content, but I still enjoyed this presentation. Entertaining, and informative. Thank you, RI and Dr Carroll.
this lecture has finally helped me start thinking of the universe as a wave function. no particles but waves.
Nope. Everything has duality of wave and particle thats what quantum mechanics tells.
@@danyeol1 I stand corrected happily with this duality lol
without quantum mechanic theory, there is no semiconductor and without semiconductor there will be nothing as a modern world. The miracle of Quantum theory.
Quantum Physics: The dreams that stuff is made of.
@@abhishekac1881 Here in America, we have a phrase that goes, "The stuff dreams are made of" to indicate wishful thinking. The fact that quantum physics is mainly based on equations and theories, yet explains the existence of all matter in the universe makes the reversal of this common phrase humorous.
LoL. Nice twist
Fivk
I'm going to bed Jim
@@wisconsingoldrush8270 you misunderstand what "quantum" mechanics can do (spoiler, its nothing)
I was in a super position where my brain both hurts and doesn't hurt, but then I became entangled with the environment. So, when you open the box, you will find me and my brain already hurts, because Dr. Carroll was in my environment lol Thank you Ri, for another great video.
peace
LoL. Yes
One thing I enjoy here is Dr. Carroll's clean and concise language.
28:44- This way entanglement makes perfect sense.
Sean, I love you bro. You keep on being you, and I'm going to keep on being me appreciating the heck out of who you are.
🙃This is one of the wonderful lectures about 'reality' available to all on the internet. How lucky we are! We don't even need to be matriculated at Cambridge U to be privy to it. Thank you Mr. Carroll and to all those others responsible for making this [and I might add other great lectures available on the internet] to everyone who wants to be more excited about the universe.
ok bot
The double slit experiment totally blows my mind
quite amazing yes! more amazing to me is youngs equation which determines the frequency and the wavelength !😳😳
Thank you very much , Sean , a fascinating and almost comprehensible lecture .
What possibilities this could open for our species .
But , an urgent request from an old guy who has been following this subject all his life .
Will you please BLOODY GET ON WITH IT , as I am desperate to know the answer before I croak .
This guy is a charismatic good speaker. Energetic. Takes the mysterious & makes it understandable.
As Mr. Charles Miller puts it: "The best lecture on this topic I've ever heard! Thank you Dr. Carroll. I envy your students!". Yes, if I had Dr. Carroll to be my quantum mechanics professor back 60 years ago......
I want a whole lecture on what Sean was talking about in the last few minutes!
But you don't want to buy his book?
@@yrebrac Wait, what book?
From what little I gathered, and from what fraction of that I could comprehend in some sort of mabey sorta correct or not way, it's like 3 dimensional space is a "simulation." When playing a 3D game, objects aren't "litterally" seperated but their seperation, or virtual space itself, is a result of mathematical equations. Only OUR space is defined by vibrations which translate and interact in such a way as to "simulate" space from a sentient perspective.
For the record I have barely any idea what i've just said.
@@ASLUHLUHC3 he wrote books buy it and become more confused
There are loads of lectures on quantum field theory out there on the internet ...
Woo Sean Carroll, one the more open-minded scientists. Lots of respect!
A true physicist is the most open-minded person you are ever going to meet. Both in their professional and philosophical outlook and also in their libertarian and social disposition. You have to be of this personality (open to change) if you ever want to progress in this field of mankind's endeavor.
Sean Carroll is a charlatan.
@@ZeroOskul actually by definition you are the charlatan cause I have no idea what youre on about
@@GiggleBlizzard That you feign illiteracy means you cannot just point at people and use words to demean them.
You understand none of the words you used nor their meaning as a sentence if you do not understand the words I used.
Any words you use, while feigning illiteracy, are meaningless.
Hope you get better.
Try asking what I am on about instead of deciding that I munst be A, B, or C because you don't know what I mean.
zerooskul Okay. What are you on about? Why is he a charlatan?
Fantastic. Relived the frustrating experience of having to shut up and just accept quantum mechanics/Copenhagen interpretation when I was 19 at Berkeley (1980’s). Love Sean Carroll’s intelligence.
its been over 100 years since we discovered the quantum world and the more we try to get to the bottom of it the more incomprehesible we find it. I think we shoud just accept it as it is
The brief lecture on Quantum Mechanics is 56 minutes. Imagine a long one…
@MOE SEDWAY ⅛
Outstanding explanation. I came looking for the way physics currently sees the world and I was not disappointed.
That's cool, except that this is not how physicists see the world.
Excellent job, possibly the best explanation I've heard to date.
I'm a simple man... I see Sean Carrol... I click "like"
Not Carroll? Interesting.
Am I the only person who is not unsettled by the repercussions of the multi world theory?! In fact, it brings some level of comfort to think that there are parallel universes that are much better than ours. I don’t know but it feels very poetic to me.
Question Sean, what if the fact that what we are observing when uranium decays are fields at their highest possible energy state, hence why they behave as if they are particles, but they are in fact the electron fields moving through space and are merely compressed by the energy state?
This is an absolutely fantastic talk on quantum. I’m just putting that out there
I've watched this video over and over and over again and each time I learn a little more.
Thank you for this fantastic lecture! I have listened to everything RUclips has to say about Quantum Mechanics but this was by far the easiest to comprehend for a lay person.. I still like the Copenhagen Interpretation the most.
S
Kindly send me : The Copenhagen Interpretations , as had been description as being most easy to understand previously Thanks
This was amazing. It summed up the reading I've been doing over the past few months and filled in a few key gaps due to the excellent explanation. I'm so inspired by this research and wish we could fast forward a few years like Sean said to see a fuller picture of how quantum mechanics may describe our existence. 👏
Sean has an incredible clear and understandable speech
This blew all of my many minds - what a great guy
Wow. It's been a long time since I've listened to Sean Carroll. This lecture by far is one of the best I have heard on this subject. Dr. Carroll presents an intriguing and fascinating picture of the problems with understanding quantum mechanics. Just might buy his book!
If you like Dr. Carroll, I’d recommend his podcast Mindcape (www.preposterousuniverse.com/podcast/2018/07/02/welcome-to-the-mindscape-podcast/). He interviews other very interesting people and one gets to learn a lot.
Such a beautiful theory and explanation, the harmony of an idea such as entanglement truly gives me goose-bumps. There is gold in the hills of this frontier, so I am confident that many will come to explore, map, and dig.
Wow! not sure how I came about your video here but I watched it start to finish and was fascinated! Thank you for such a brilliant lecture!! ♥️ No uni student here but found this fascinating and a great description / understanding of such a complex science, kudos!! 🙌🙌
The material world is an imagination of a conscious mind.
Undeniably this is the best video on this subject 🎉🎉🎉
I wish I could just sit down and talk with this guy because I still have so many questions
I swear to gezzus it wouldn't fix a one of em'.
@@sidehustlediscovery3226 fair
Hi Sean
Here's a simple question for you. If gravity waves propagate across the universe at the speed of light for unlimited distances, doesn't that mean space it's self is a medium of some substance?
I compare the gravity wave to an ocean wave. In the ocean, waves are created by several different methods. Some are wind generated some are tide generated and some are earthquake generated.
The biggest are created by displacement of underwater tectonic plates during earthquakes. A landslide on the shore that slides into the ocean can make large waves too.
A gravity wave generated by merging neutron stars or black holes or other similar displacement/merger events creates gravity waves that spread out thorough space just like water waves.
Wouldn't that suggest SPACE is a substance that is more than a void? What allows a gravity wave to propagate over vast distances if it wasn't moving through a material that supported the waves movement.
In a water wave the water doesn't actually travel any real distance, it just moves locally and the energy keeps moving through it farther from the source.
Gravity works the same way in "SPACE".
People keep looking for gravity to be a mater of mass of objects when it's the displacement of SPACE the object sits in. Your looking for gravity where the light is better and it's far from the light you are using.
That's my understanding, gravity, it's not a quantizable force. Art