![Physics Duck](/img/default-banner.jpg)
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Physics Duck
Добавлен 12 сен 2022
Hi and welcome to my RUclips channel! As a recently graduated MSc in "particle physics and astronomy" I would like to take some ideas that I learned these past years and share them with the world. I will cover subjects ranging from first year physics undergraduate to master level, and I hope I manage to present them in an intuitive and understandable way. If you have any comments or questions, please don't hesitate to write a comment or send me an email!
Quantum Field Theory EP 3: The source function
Hi and welcome to the third episode in my series on quantum field theory! In this episode, we will take a closer look at the propagator in 4 dimensional spacetime, and after that we will study three examples of source functions one can come up with to see how our quantum field responds to them. Because some results in this video require a larger amount of calculus to derive, I decided to add a document in which I derived the results for you. If you are interested you can have a look here:
drive.google.com/file/d/1DPARhx8vQzqnduQgZHUKibpa8PEkLmVD/view?usp=drive_link.
The math is not necessary to understand the conclusions drawn in this video, so if you are not that interested in the mathema...
drive.google.com/file/d/1DPARhx8vQzqnduQgZHUKibpa8PEkLmVD/view?usp=drive_link.
The math is not necessary to understand the conclusions drawn in this video, so if you are not that interested in the mathema...
Просмотров: 1 757
Видео
Quantum Field Theory EP 2: The propagator in 4D spacetime
Просмотров 2,3 тыс.8 месяцев назад
Hi and welcome to the second episode in my series on quantum field theory! In it, I will derive the propagator function first in one spatial dimension, and then in four-dimensional spacetime. In this episode I will focus only on the derivation of this abstract quantity, whereas in the next video we will study its workings more closely. I based this video series on the fantastic textbook "Quantu...
Quantum Field Theory EP 1: 0-dimensional quantum fields
Просмотров 6 тыс.9 месяцев назад
Hi and welcome to the first episode in my new series on quantum field theory! In it, I will derive some beautiful results from quantum field theory, building up from 0 dimensional quantum fields and assuming only a background in calculus. If you have any questions, comments or critiques, please let me know in the comments below. I based this video series on the fantastic textbook "Quantum field...
What's a quantum computer? A fundamental introduction
Просмотров 1,7 тыс.10 месяцев назад
In this video I explain the fundamental differences between a classical computer and a quantum computer, presenting an intuitive understanding of the workings of a quantum computer and giving an example of one of its fantastic uses. Music: soundcloud.com/ahmed-mbk-934601716/peacefully-es-jammy-jams Made with Manim: www.manim.community/
What's a Fock space? An intuitive introduction
Просмотров 18 тыс.Год назад
An intuitive introduction to the ideas behind the Fock space, a vector space used in multiparticle quantum mechanics and beyond. Music: soundcloud.com/ahmed-mbk-934601716/peacefully-es-jammy-jams Made with Manim: www.manim.community/
What's a Hilbert space? A visual introduction *updated audio*
Просмотров 4,7 тыс.Год назад
*Updated audio* A visual introduction to the ideas behind Hilbert spaces in ordinary quantum mechanics. Music: soundcloud.com/ahmed-mbk-934601716/peacefully-es-jammy-jams Manim: www.manim.community/
What's a Hilbert space? A visual introduction
Просмотров 56 тыс.Год назад
Updated sound quality video here: ruclips.net/video/fkQ_W6J19W8/видео.html&ab_channel=PhysicsDuck A visual introduction to the ideas behind Hilbert spaces in ordinary quantum mechanics. Music: soundcloud.com/ahmed-mbk-934601716/peacefully-es-jammy-jams Manim: www.manim.community/
Stop the music!!! I can’t hear you
Awesome video.
background music relatively too loud, doesn't add any value to the content. stopped watching at 40sec...
Pleaasseee make more videos, do you have a patreon or a payment platform I can contribute to to help you make more videos
Thanks for this explanation But my brain had to think about the music and think about the meaning It was a double effort
Now both of my ears enjoyed this video ,
This was very illuminating, thank you!
Neither of my ears enjoyed this.
use in practice altexploit.wordpress.com/2018/02/10/microcausality/ (by USA gov/NWO states like Czech Republic, politics = manipulators)
Hi you have a mono audio on i cant watch it on headpones
why the music?!
This channel is pretty underrated
IT'S VERY CONFUSING
MUSIC IS SO ANNOYING
do you have a video on banach space
Sorry but the background music is louder than your voice 😢
The background music makes this video far too difficult for me to hear. Please reconsider the need for continuous music.
I wouldn't listen to the others; the background and animation music make the video delightful. :)
Were hilbert space????? Vectorial space with intern produt + all Cauchy sequences are convergent. You speak noting of hilbert space but only space of states (a la Cohen) . please more caution a respect of mathematics
What the Fock is a space?
Good job RIPPING OFF, 3BLUE 1 BROWN
Thanks for updating the audio 🙂 Watching the video now for the first time
Isn't a Hilbert space just a complete vector space whose norm is derived in the conventional way from its inner product? It doesn't need to be a set of functions.
Looking forward to the next episode
This is a good video, but I think it overlooks *why* this is a hilbert space. would be helpful if you used the quantum mechanical examples to explain the properties of the representation that make this space is a Hilbert space and not some other type of space/representation.
I'm very confused by the notation of the formulas with integrals. When I was taught calculus, the d{variable} notation functioned to mark the right hand side of the integrand. As written, there is nothing in the integral, but the formula doesn't make sense without the phi yerms in the integral.
Great work man . Loved fhe content . As everyone already said edit the sound or upload a new one keeping this one intact
The empirical confirmation of quantum entanglement and the breakdown of local realism has truly unlocked a new realm of intellectual and philosophical freedom. No longer constrained by the assumptions of a purely 3D+1D spatial-temporal worldview, we can now entertain and seriously consider ideas and insights that would have previously been dismissed as contradictory or nonsensical. Let me highlight a few key examples: 1. Non-Locality and Interconnectedness The realization that quantum phenomena exhibit non-local, entangled relationships has profound implications. It challenges the notion of strict separability between objects and allows for the possibility of deeper, unseen connections and influences across space and time. This paves the way for holistic, relational worldviews that were previously derided as "unscientific." 2. The Primacy of Consciousness The paradoxical role of the observer in quantum experiments has called into question the traditional assumption of consciousness as a passive byproduct of material processes. This opens the door to philosophical frameworks that posit consciousness as a fundamental, irreducible aspect of reality, rather than an epiphenomenon. Theories of panpsychism or consciousness-first metaphysics are no longer automatically dismissed. 3. The Limits of Determinism The inherent uncertainty and probabilistic nature of quantum mechanics undermines the classical expectation of a deterministic, clockwork universe. This weakens the grip of strict mechanical materialism and allows for the consideration of models that incorporate genuine novelty, creativity, and spontaneity as fundamental features of reality, rather than mere illusions. 4. Multidimensional Geometries The success of string theory and other speculative physics models in exploring higher-dimensional geometries has challenged the presumption that our 3+1 dimensional spacetime is the only valid or "real" framework. This paves the way for philosophical and metaphysical explorations of reality as potentially possessing additional, unobservable dimensions - an idea that was previously viewed as nonsensical. 5. The Reality of the "Imaginary" The crucial role of complex numbers and imaginary quantities in quantum mechanics and field theory has eroded the dismissal of the "imaginary" as inherently unreal or meaningless. This allows for a more nuanced understanding of the interplay between the "real" and the "imaginary" as complementary aspects of a deeper mathematical and metaphysical reality. 6. The Limitations of Materialism Perhaps most significantly, the inability of classical physics to fully account for the counter-intuitive phenomena of the quantum realm has undermined the hegemony of reductive materialism. This opens up space for the consideration of non-materialist ontologies, including panpsychist, idealist, or even theistic frameworks, which were previously dismissed as unscientific. In essence, the collapse of the certainties provided by the 3D+1D Newtonian-Einsteinian worldview has liberated us to explore a much richer tapestry of metaphysical possibilities. Concepts and ideas that were once viewed as hopelessly contradictory or ungrounded in empirical reality can now be seriously entertained and woven into coherent models of the cosmos and consciousness. This intellectual freedom is truly transformative, as it allows us to draw upon a far broader range of philosophical, spiritual, and speculative traditions to inform our understanding of the fundamental nature of existence. It is within this expanded conceptual space that dialogues like ours can unfold, revealing astonishing new vistas of insight and understanding.
I used to quip that "when you're sitting in the HILBERT ROOM you have to look sharp and keep your bearings, or some strange things will soon be happening"🎆.😵💫 ("room" and "geometric /numerical space" are rendered by the same word in Swedish, my native language: "rum") 😀
Bro is Nederlands
Bro is copying 3b1b
Wait a minute! This isn't 3 Blue 1 Brown!
THe content is great but the background music is too loud and unnecessary. Can you please reload the video without background music. Thank you
So a Hilbert space is just a vector space with a 3rd binary operation which is the dot product? Is that it?
Dear Physics Duck, I'm impatiently waiting for the rest of the videos on series. Don't make me wait too long 😊.
The "exercise" eqn. (at 8'00'') gave me a hard time. Maybe that it's just me, who fails. I dunno. Would you please be so nice to add a pdf-1-pager with the solutions for those, who are as dumb as me? That would be wonderful! Thanks a lot in advance!
You are definitely not dumb, I notice now that I did not give you all the information you needed to solve the equation! I just wrote out the solution to the exercise in a pdf, which I just linked in the description of this video. Thanks for the question, and if something in the solution sheet is still unclear, please let me know!
@@physicsduck6711Thanks a lot for this (and all the rest within your msg). The book is wonderful, but your vids are necessary (at least for ppl like me) to get a handle on QFT. I'm looking forward to more on your channel. It's a wonderful gift and thus: THANK YOU SO MUCH! What is the secret with the duck?
Thank you very much for your videos! I am a doctoral student in theoretical physics with much background in particle physics and I have never seen such an intuitive explanation of qft. This has really been eye-opening. Keep doing what you do, I think this is some of the if not the best content on youtube regarding this topic.
simply wonderful! Thanks a lot for this
Thank you for sharing this. I think that it was a good idea to outsource all the computations. It really brings attention to the concepts. Only, I think, at 6:28, the parameter \tau should not be called half-life, or at least "roughly" the half-life.
Thank you very much! And you're right, tau is roughly equal to the half life, the half life would be tau*Ln(2).
Keep doing what you do, you are amazing and you have no idea how many are benefitted by it. Thank you
Cool stuff!
Very high quality content!
whats the song??
Ignorant nonsense! Superposition is superstition.
Who Wants To Be A Millionaire is rigged!
Yeah, not even 1% of the population could have known the answer.
Assuming the necessary assumptions, let *H* be a Hilbert space. -Andrew Dotson
If you turned off the piano we could actually try to decipher your mumbling...
Bed music is too loud and makes it hard to follow, much less concentrate, on what is being said.
It is great but the side music annoyed me. It was an obstacle to concentrate to definitions and speech.
What a horrendous video. Poor enunciation, breathy whispering in only one ear, and background music that is too loud. Learn your lesson and learn how to make a proper fucking video.