How Physicists Created the Double Slit Experiment In Time
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- Опубликовано: 25 июн 2024
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The famous double-slit experiment, which demonstrated that light is both a wave and a particle, has been performed using “slits in time”.
If you'd like to watch the interview I did with Prof Ricardo Sapienza, jump over to our members page to check it out here: • Prof Riccardo Sapienza...
0:00 Light Can Interfere in Time as well as Space
0:52 The Classic Double Slit Experiment
2:21 The Double Slit Experiment in Time
5:05 Ad Segment
6:15 The Experimental Results
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If you get 200 more views today, 2/3 of it is me rewatching
And a few me.
But what colour would your view be
Why not finish watching that last time?
Same here.
@Johnald Wick hahahah😂
The interference pattern from a double slit is (essentially) the Fourier transform of the spatial pattern of the slits (integrating over a complex exponential in space), so it would make sense that it would be true in time as well. But I also am coming at this from an electrical engineering perspective where we love to apply the Fourier transform.
I was thinking the same thing. You don't need to invoke quantum mechanics to understand this, you can get the same result from classical electromagnetism and Fourier transform theory.
My guy we all aren't Einstein. This isn't english.
This paragraph made me feel more incompetent than any paragraph I've ever read and my iq is 120 lmfao.
@@ronaldbrody9 same here brother lol I feel really thick watching Ben's videos lol
@@ronaldbrody9 Do what I do, pace yourself !
Maybe the situation can be explained easier.
What is important - and when thinking about it, should wonder more people - is the question why light is actually bending at the two splits in the classical experiment. Because this makes the result clearer.
The reason why a laser beam can behave like a ray until it hits the split and afterwards like a wave, is the Heisenberg uncertainty principle.
The moment you define the location with high precision, the more you mess up the impulse. Thus, with the light passing a very tiny (certain) split, you create an impulse pretty random (uncertain).
That is why suddenly the light can change the direction and move to the "side" instead of continuing its former trajectory. It is then when it can interact with another wave (even with its own) and get "diverted" (simplified speaking).
With the temporal splits, it is the same. The shorter the impulse of the photon is, the more specific its location is defined. However, that gives a more random impulse.
This is already well documented for single impulses. A "pure" red light (or laser of a single wavelength) in super short impulses (e.g. photons of synchrotron emitters) is located at a certain location and thus changes colors - since a different (uncertain) impulse means an uncertain energy. Another energy in light means another color. So if your light pulse is just short enough, it may change from red to green or so.
This is not new, but might help understanding the next step.
Like with the two waves in the spatial experiment, the two waves in short temporal distance can interfere with each other. This interferance is the pattern we see.
Maybe that helps a bit.
Light acts as a wave. Waves have a size defined by their wavelength. Particles are much smaller, perhaps points in space.
Light has energy and it takes time to propagate. Heisenberg uncertainty extends to energy and time. Seems clear to me
"Light travels through all possible paths at the same time" --- that is deep
Great explaination of this really cool experiment. Also I like the addition of the motion graphics. Your videos are getting better and better. Great Work!
Thanks! Right back at you 👍
It definitely is a great explanation. I'm no slouch in physics and this experiment really fascinates me, but this is the first explanation after several videos that I actually understood.
The question I have is why does the amplitude of light not count towards C? When calculating distance traveled for the amplitude is ignored. Something of the light in a longer wavelength travels further than shorter ones (or vise versa?) , no?
@@JohnKerbaugh light oscillates perpendicular to the direction of travel, so it doesn't really apply...
@@DrBenMiles this video's background music is not tacky and annoying enough
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The real question is, does the interference pattern extend backwards in time, before the pulses were reflected? Since the pattern is, in theory, infinitely wide and symmetrical, it should be the case: it should be possible to detect some photons earlier than the pulses are reflected, and no photons during the transparent phase.
With that, we have a way to send signals into the past.
@@Milan_Openfeint I think that this possibility is ruled out from the moment the wave function collapses, that is, when the interference pattern is detected. Although it would be interesting how a delayed choice or eraser version of the experiment could be performed. In any case, I don't see the relationship between symmetry and wide of the interference pattern with it extending into the past.
This is a fascinating and well-done explanation, but my brain keeps yelling, "Aren't these just Fourier transforms stretching wave packets? And similarly, doesn't the frequency spread for the same reason that sharply banging a gong produces loads of frequencies?" Yes, there is time uncertainty, but doesn't that also stretch the wave packets in length, allowing a more mundane explanation? I loved the potential for that femtosecond cutoff; that's one of those nifty new-tech enables that could go in very unexpected directions. Very cool.
There's no surprise about broadening the spectrum on short pulses of light, it's similar result to when you do a fourier analysis on short pulse of sound - even if the sound itself is constant pitch at single frequency, the transition from "no sound" to "sound" and back introduces whole spectrum of sound frequencies that need to add up to form such a pulse. I'm somewhat curious how they arranged things for the two pulses to interfere, though. So It could be equally interesting to see the description of the instrument they used to detect the pulses and different frequencies of the result.
The image at 8:01 showing the response for a single time slot is surprising. Based on the same Fourier intuition as you have for sound, i would have expected a sinc pattern in that case too. I am not sure if that’s a simplified image for the purpose of vulgarisation or if it is part of the original experiment.
@@fvsfn agree with your comment. Maybe expect a sinc()^2 function. I guess what’s happening is the electric and magnetic field of the packet of photons is getting truncated causing the broadening in frequency as expected using Fourier theory. In the case of two (or more) temporality close pulses we are seeing interference/interaction between the broadened frequency electromagnetic fields of the two pulses as a result of them also being spatially very close together.
I am probably being to simplistic but that seems to make sense?
exactly. because then the inpput pulse must be a gaussian. But two gaussians interfering should give another gaussian, so the simplified fourier approach might not be the whole story
I think you've hit on this precisely - the on / off of the pump laser defines the frequency bands - the on/off of the pump laser behaves exactly like you expect to get if you put a square wave through Fournier analysis(which effectively the on/off of the pump laser is).
So something to ponder - either this is bogus and not really showing what they propose, or maybe it gives us a deep insight into the time and space interference and see if / how it relates to frequency interference via a fournier analysis. It would be extremely cool if we could correlate the infamous double slit experiment to fournier analysis, and potentially other frequency manipulation / analysis tools such as Laplace frequency transforms.
This is fascinating and the way you explain such a complex subject in a simple way is admiring
The ‘photon’ doesn’t go through both slits (in space or time), the ‘photon’ is the absorbed (detected) state. The wavefunction is what goes through both slits, either because it is dynamic while spacetime is fixed, or (more likely) because it is fixed while spacetime is actually dynamic.
You believe in "spacetime" ? 😅
@@strangevideos3048 not as a real thing per se, but as a metric to measure how mass energy density affects itself yes. how else can you explain the effectiveness of Einstein's equations in GR?
I have pondered upon exactly this idea of double slit experiment in time and using light for logic... feeling scientist now😅
This is by far the best video I have ever seen anywhere on RUclips
One fact that really blows my mind is that light travels at lightspeed so technically relative to the photon no time passes between it's creation and absorbtion. It just exists and it doesn't even realize it was reflected by some femtosecond-material thingy 😂
It's so mindblowing how something can exist outside and inside of time at the same time 😊😅😂
This is the best explanation for the existence of God, he is light and exists outside and inside space and time.
God is not light.
@@deltalima6703 To me he is. My Bible says he is. Don't sweat it.
@@colinyesutor2600 The more we understand about the universe, the less we need to rely on made up stories about imaginary friends.
@komivalentine3067 Thank you. I think this comment has helped me understand the experiment results a bit better (perhaps) - In my head, I feel like "how can the 2nd set of photons interact with the first set of photons because some time has passed in between?" but the photons would just say "Time passed? When? We've been here all along!" @@colinyesutor2600 I think you are using two different definitions of the English word "light" rather than talking about the same thing - as in the original comment is talking about light the electromagnetic phenomenon and you are talking about light as in goodness or godliness (unless you are suggesting that you believe that God is an electromagnetic wave which would be unusual, easily disproved and it would be unclear why an electromagnetic wave would be worthy of praise). This experiment makes no comment on God's existence. TLDR: Words can have many different meanings.
So the take away is that we can switch ITO incredibly frequently.....cool. And that interaction with the ITO surface modifies the probe beam.....kind of squishing it out. Got it.
Super concise yet comprehensive explanation. Thanks!
Wow, that's a mind-bender. Btw, in the sound world we call those additional frequencies sidebands, and they are like little reflections of the carrier.
Pausing before watching to point out yet another fabulously appropriate facial expression in thumbnail.
I work in the entertainment lighting industry. In the last 10 years the shift to using LED lighting has changed the industry. LED's tend to use high frequency pulses to simulate dimming. We often manipulate the frequency at which those pulses happen for different effects or to help us work with cameras shutter speeds. When we change the frequency at which pulse happen there is often a color shift that happens. I wonder if this is why.
I like the phase change causing output of an interference pattern. The pattern can be controlled by the speed of the pulse. Rad.
WOW.. the implications of this for future computing and quantum computing is absolutely incredible...I can't wait!!
The crossover of these concepts with acoustics is something I really love. I've often wondered whether an implementation of time-reversal to the double slit experiment is possible. Christ knows which way it would be done; maybe there isn't one.
A trillion times faster than the blink of an eye WHAT
Happy to see Riccardo here, he was one of my lecturers at Imperial, very nice guy
...brilliant video!...incredibly difficult subject presented in a very clear, understandable way...helpful graphics too...
Clean concise explanation 👌 Thank you for your work good sir
*About 20 years ago, there was an experiment of this double slit experiment*
using SINGLE photons. This EU group shot a single photon a second and after a week,
they got the same interference pattern as if they shot countless photons per second.
The theory was that the photons was either (1) interacting with photons from another dimension (2) interacting with photons from foward/backward in time.
Or 'sideways' in 'time.' My theory is there are multiple time vectors, but physics has written the math as if there's only one. D = Delta T meaning there's as many time axes as space dimensions.
@@organicdoorbell5881 I've heard about that a decade ago and I'm still confused on the physical meaning of "extra" time dimensions.
Keep it simple. It interfere with itself.
@@johnsmith1953x I did a little math around it in my book (unreleased so far) that indicates we are only 'partially sampling' time. It's different but analogous to Many Worlds interpretation of quantum physics. Regardless of how many vectors, it seems we evolved to only perceive one 't'.
@@organicdoorbell5881 Then is it possible to go back in time that is a different "sideways" or parallel time rather than the current time?
If you have slits in a card, it is like a doorway which has thickness. This means that photons could ricochet off the sides of the slits and produce the patterns.
It's amazing... please make more detailed videos on this subject ....
It might have been useful to talk about Fourier transforms in this video.
agreed, Im surprised it wasn't even mentioned
Having light computers sounds super cool. Definitely a bright idea!
We got phones, there pretty light
@Jarno van der Zee I wonder how many people will understand the weight of your comment.
If its asleep it has no weight.
Wow.. so much thankful for this.. have been looking for what's next and new and exciting.. double wow..
Great channel. Thanks Ben!
i havent yet seen this hypothesis..but i can only come to the conclusion that when you dont observe the double split youre not sending light at the light and when you are observing it you are sending light at it and the light colliding with each other coming from the detector is causing it to go from a wave to a particle. give me my Nobel prize !
Yes yes please more of this content. Capture the light with the trillion fps camera.
Ahh the double slit experiment. What a throwback!
What about the reaction time of the sensor that “reads” the incoming light? Could it just be that the material the sensor is made out of is entering a harmonic with the light and “re-releasing” it at a different frequency, only to get trapped and “re-read”? Like how atoms release infrared to describe heat? Maybe this is just the “heat equivalent” of a harmonic. This could just describe the interaction between light and matter, not what light actually is (particle, wave, wave-particle). The regular double slit experiment’s harmonic function would just be based on the size and distance the slits are from each other. Either way this interaction could be very valuable if understood fully. I can imagine a “light calculator” by varying the size (or duration of pulses for this experiment) of each slit against the other and summing or running other algorithms with the results.
I need to watch 2 times to understand, good video thanks brother
That is very interesting. I am very interested in the progress towards optical computers. I see a future where a computer is a specially grown crystal where the processing path bounces back and forth through the crystal between switching devices, and through cavities to allow for processing time variations. This will give better protection against “jamming” of computer operations. More funding to your field!
So the crystal skull was a super computer??
@@woutmoerman711 grown by Nvidia
Haha…super expensive diamond processors…
Brilliantly described. Thank you
The Heisenberg uncertainty equation is usually written as (delta-x)(delta-p)>h/2*pi but you can also easily rearrange the Heisenberg equation so that, rather than position and momentum, it instead refers to energy and time. That is (delta-E)(delta-t) on the left side but remember that a photon's frequency is directly proportional to its energy (E=hf). So, in the traditional double slit experiment the delta-x is confined to one of two slits so the uncertainty in the lateral momentum must increase (two probability waves spread out and form a spacial interference pattern). From the (delta-E)(delta-t) point of view if you confine the (delta-t) to two time slits, then a similar thing must happen except now the two uncertainty "waves" are in the E=hf frequency. This creates two interfering frequencies and the associated beat pattern that is observed.
Fascinating! Well explained, too. All the information is there; I just had to watch it a few of times. Of course, it helps to understand the classic double-slit experiment, where an interference pattern still emerges if individual photons are sent through, the photons being said to interfere with themselves. In the new experiment, however, it's the stretched-out frequency range of the different pulses that interfere with each other in time. I'm not a physicist, but could it be that in the classic experiment, the individual photons are actually also interfering with each other in time, as opposed to with themselves? This even seems to make more sense of the delayed-choice quantum eraser experiment, where turning on the which-way detector "in the future" causes the interference pattern to disappear "in the past." Maybe which-way detectors prevent pairs of photons from interfering with each other in time. But, surely I'm not the first one to have thought of this.
if you think about it the probability of two photons sharing the same exact instantaneous phase should be vanishingly small, so if another photon appears to fit the same description as a pair its because to begin with all you were describing was one big photon called the EM field
@@SplendidKunoichi Lasers emit photons that are in phase. If they weren’t, they couldn’t for example be used to detect gravitational waves.
@@NiToNi2002 lasers emit photons randomly. That's why they are coherent. Look up bunching and anti-bunching
What I'd like to know is if the pulse laser just shot a single photon at a time, would you still see the quantum probabilistic interference pattern? Like in the classical two slit experiment. Of course, I'm guessing you would.
Is the maximum amount of energy transferrable by a single photon enough to change the reflectivity of this indium-tin-oxide material?
@@Littleprinceleonsomebody got the laser names wrong, either you or op. I think op means can the signal laser fire only one photon and the control laser can do whatever it does
I think that is not possible today. Imagine how difficult it must be to produce a single photon right in the time window in which the slit "opens". Or in other words, synchronize the production of the single photon with the pulse of the other laser.
Light from the future being able to interact with light from the past is just spooky to me man
Impressive!!! Thanks for the good explanation!
When I was 14, at school, I proposed that the Double Slit experiment be conducted with electrons in vacuum apparatus of some kind. The idea behind that was to fire electrons one at a time, and compare that interference pattern (if any) with one made earlier via streams of electrons.
I believe that experiment has now been conducted but using light rather than electrons, even though the latter are easier to manipulate!
I highly doubt it.
Great stuff. Thank you for creating this. Subbed.
I've got a hunch that this could lead to the number of point particle counts for a certain beam, this would allow for an equation similar to electrical amperage. Perhaps a collapse of frequency can be found, a null phase in matter reflection, aka, invisibility.
The same is true of sound, I hear: Taking any note and repeating it at the frequency of another note will transpose it to that note.
E.g. repeat 'C' 440 times a second and it becomes the note 'A'
Great work!
This is great! I love hearing about bleeding edge experiments. Just like when the laser was 1st theorized. It took a long time, but where would we be without them?
Wait... Couldn't you make an optical transitor like this?
Completely missed the point...
This is just equivalent to the creation of spectral "sidebands" on a radio frequency carrier in case of amplitude modulation at frequencies not very much smaller than the carrier frequency.
The probe laser represents the carrier with long coherence length and the femtosecond double pulses create an amplitude modulation which creates the optical sidebands in the spectral domain. And because of the longer coherence length they of course(!) overlap to create the optical spectrum of a double pulse.
This, in fact is trivial, just check the well-established "pulse shaping in frequency domain" technologies. There even are holograms with spectral properties to create pulse sequences from a single readout pulse or vice versa. This was already demonstrated back in the 90ties, when femtosecond lasers became available...
Just a consequence of the optical Fourier transform from time to frequency and back.
Cool. Thanks for sharing.
"Computing on a beam of light" should lead us to intergalactic travel somewhere down the line. Think about those "tic-tac" UFOs
Firstly, a very well put video. I am still thinking this is a better version of double slit in space and not time. Just because the timing of slits is considered the interference is still happening in space.
Great video. Cheers !
Clear and concise, very well explained. It's exactly what I understood from the little data from the experiment post. I did not understand, however, what the material has to do with the change in frequency of the reflected beam. As far as I know, in theory the reflected energy is conserved. If so, where did that energy go after the temporary interference?
Well, yes, the energy is conserved, however, the switching of the material, even though is extremely fast, is not instantaneous, thus creating a sort of reflecting gradient for the reflected beam to bounce off of; the "head" of the reflected beam penetrates a bit deeper into the material before it is reflected, than the "tail" of that switched length of beam. This gradient is what they referred to as "stretching like a spring would", essentially splitting that portion of the beam into multiple wavelengths/ frequencies corresponding to the different states of reflectivity up until maximum reflectivity. The energy is thus split into these resulting beams like a gradient. I'm more curious of what the relationship is between the switching beam length and the switching time of the material...how does having longer switching beams change the result....surely the switching time would be the same but just the period of maximum reflectivity would be longer...how does this affect coherence and does it matter and how much it matters?!?!
@@marian-gabriel9518 If I have understood your comment correctly, the frequency change would occur because in those 10 ft of transition of the material between transparent and reflective, part of the infrared laser beam is reflected at different depths of the material. This would produce diffraction and consequently a change in frequency or energy. However, that energy loss would be almost negligible in that case. Also, how would you explain that that only happens when there are 2 reflected pulses? When only one is reflected, that is, a single slit, no change in frequency is appreciated. And as you say, why is this decay in the spectrum related to the separation in time of the slits? On the other hand, would this experiment be possible with a single photon setup? In that way, it would not be possible to attribute in any way the result of the experiment to the interaction with the material. They do not want to rush to their conclusions but I think it is a more important discovery than it seems. My opinion is that the time interference consumes a bit of energy, but I don't know where it goes. At the moment they only speak of "new domain" and technological potential, but they do not say anything about what this would imply in the study of particles and time within MC.
@@Razor-pw1xn Well, exactly right. I think the key to this is how do they get the two beams to sync. They mentioned "photon acceleration". Which my guess is the manipulation of the beams, in time, via the diffraction and that gradient, in one way in the reflective material, and then back, in the "sensor" prism, essentially making them "wait" for one another. And I'm guessing this properties of the reflective material and prism directly affect the time slits intervals and durations they can successfully use. But as you say...this has very interesting implications and would very much like to see more of this.
I wonder if you could use the color changes for encryption or use the reflection changes for a laser.
Let me see if I get this right; we are talking about two different things here. 1: How the experiment was done. 2: The experiment itself.
As for the experiment itself; I assume it has more to do with distance than time. The two pulses are very close to each other in regard of distance.
I have been asking channels to convey the below experiment. I hope you convey to them. Since presence of electron detector causes it to behave like wave or particle. Try this
What if we put two rows of double slits row 2 after row 1. Row 2 double slit are made in a way that it matches the peak wave interference pattern on screen if there was only one double slit. So in this experiment the screen becomes double slit row 2. With all permutations and combinations. First experiment having no electron detector in row 1 and row 2, second experiment with only row 1 having electron detector, third experiment with only row 2 having electron detector finally last experiment with row 1 and row 2 having electron detector. Just a thought, have we tried this??
Has the thickness of the coated plate been varied within the scope of the experiment yet?
Good question
Or has the strength of the interference light been varied?
It would seem to me that interference would be analog not digital regardless of the pulse. The material would have some period to become reflective and return to transparent. In the interim some variance in the penetration and reflection would be expected.
@@JohnKerbaugh If you were to look up terms like "Signal Mixing" or "Superheterodyne" from radio technology, you'll see what I was thinking of when I asked the question. I'd also want to see what happens when you vary the angle of the glass, just to make sure.
@@sirnukesalot24 Another thought came to me, if it is in fact time traversal, does the math add up to account for stellar distance traveled?
@@JohnKerbaugh That's not really what this experimental setup is doing. You have a [reflection] / [not reflection] that's oscillating at a specific frequency, the intention of which is to develop an interference pattern based on time lag rather than just a spatial relationship. However, I can't shake the idea that, during the [not reflection] phase of the oscillation, there's a feature of refraction that's creeping into the experimental results. There's no reason I can think of in which anything remotely similar is happening on an astronomical scale. I think I know what you're thinking, but the relationship under study in this experiment isn't going to refine our understanding of redshift factors.
The classical outro music I love it!
TheFatRat - Xenogenesis
This only works because the detectors respond slower than the pulses. The detectors add up the pulses which gives the interference pattern.
You can use a prism to make the frequency separator. That's plenty fast.
If I were buying a mansion, I'd want it to have windows made out of smart phone panels. Shaders built in the glass, what a dream!
The switch for using light to run as a computer is called "transistor."
Light is just electromagnetic radiation that you can see. Most of electronics is based on controlling electromagnetic radiation.
This is all very interesting, but what really caught my ear (because I could actually understand it) was the bit about using the ITO to gate one laser signal with another. That's an AND gate if the output comes from the reflected signal, or using both outputs and one input always on, a complemented NOT gate, i.e. given signal A there is an A and a ~A output, like some kinds of flip flop. If you have AND and NOT (or just NAND for that matter) you can compose any logic gate from it. You only need electronic components for the equivalent of +5V (i.e. always on) and probably the clock signal, and you've got a full photonic computer. Am I missing something, or are photonics right around the corner?
I'm surprised that the Heisenberg uncertainty principle wasn't mentioned. The smaller and more precise the time interval the broader and more uncertain the frequency becomes.
or more generally, the Fourier Transform
Because The HUP is only really noticeable near the Planck scale, which is around 1e-43 (10^-43) seconds. The experiment deals with times at the 1e-12 (10^-12) second level (picoseconds), which is 31 orders of magnitude larger.
The double slit light experiment is the direct view of parallel universe in action as ONE in the same moment as both YOU and the creator of all things are Both inside you at the exact same MOMENT…when you add HUMANS as part of ANY EQUATION as we are an INTEGRAL PART OF the entire universe..you find why things act as they do….a response across the universe at the same time…as the creator half of us touches INFINITY AT ALL MOMENTS EVERYWHERE AT ONCE
What are the bandwidths of each band? How much did they change when the "slits" changed? What was the frequency of the lasers? More info plz?
I'm the typical double slit experiment light is mass therefore it moves once it passes thru the slit. It is pulled towards or away from other mass.
Also time is emergent from events. How do you factor this into the experiment?
Really does seems like a waste of money. There are problems in the world this could be used for.
@@ekrrethon1445 research in to fundamental physics is never a waste of money. These are the unknown-unknowns.
@cyrilio it's a waste because there are world conflicts happening now that could use this amount of attention and effort in order to improve those situations. The world is falling apart but No scientists are worried about the freekin double slit experiment being performed in a new dimension! .. They're fooling you people.
@cyrilio it's a waste of morality.
The way I look at this type of discovery is for me to accept that time itself oscillates, but with some kind of overall forward momentum by our perspective. I think this could be what is happening with Time-Crystal oscillations. If true, then this would mean that time iterates back through itself at least once, if not more than once. Of course, this would mean that time's first-pass physics might be different than time's iterated physics, thus interference patterns should expectedly emerge in some probabilistic manner depending on the number of iterations and other such (random-ish) neighboring iteration contributions.
At the end of your vid "the future changes the past" comment....I think I caught Sir Roger Penrose sayings something similar a few months back. It certainly sparked a lot of thought about it from myself.
I honestly dont understand why is it so mind blowing because BOTH of the experiments ARE PERFORMED IN both TIME AND IN SPACE, the only difference is, the original was performed in "one point in time" with different space "frequencies"(coordinates), and the new one was performed "in one point in space" with different time "frequencies" (well at different time, different nano seconds or whatever it was).
To me it's weird to assume that the result would differentiate. The only way I can see this being mind blowing, is that if I still didn't know that the time is... well... kinda like space, but the only reason we cannot go back and forth is because of the nature of our material world. But if you do know this, and know that the universe is nothing more than just energy oscillating at different frequencies this whole Slit in Time thing is not that mind boggling. Sorry if it sounded like a brag lol, but um... yeah, had to make a case for it somehow.
It's using space but what they're looking for/ measuring for are TWO DIFFERENT THINGS.
@@soundrogue4472 its not the things we are meassuring that are the subject here. Its the principle by whitch both of those things work, which is the same
The question that I have: When did they register the Photones? Also in between the reflection time ?
In the split experiment in space, we also see the light at place between the slits.
It looks a lot like typical nonlinear multiplication similar to mixing effects. You get a carrier, and the Sum and difference frequencies generated.
The potential is very exciting.
Question - is this related to Fourier analysis and the Heisenberg uncertainty principal ? The way the spectrum of frequencies is broadened as the time between pulses gets smaller? If so, would this be another way to explain/ understand the process?
Thank you
I'm not even sure what it means, interference in the frequency domain. Or how that could come about from 2 pulses that do not overlap in time. If you want to study these phenomena, you need some kind of grating to separate the different frequencies, which introduces path length differences. In 2.3 ps, light only travels 0.7mm, so part of these pulses might actually overlap temporally at the detector if you don't take extreme care to avoid this.
Thank you. It should be passing through the slits simultaneously.
@@ekrrethon1445 But wouldn’t that be the equivalent of merging the two slits into one for the original double slit experiment? The purpose of this experiment is to vary the time domain, not the physical
@@_vizec I see. So the intention IS to separate instances. Soooo then whats the purpose of this?
@@ekrrethon1445 well, as in the video the light pulses are the “slit equivalent” in the classic experiment. Since it is much more difficult to vary the physical properties of the original experiment (size of the hole, and distance between them), if this experiment has a correlation to the original double silt experiment then we could vary these parameters instantaneously. This means that if we ever find an algorithm to use to get meaningful results from the variation of these parameters, we could literally make a computer that runs on light.
@Vizec I watched the video. I'll rephrase, what is the purpose of putting effort into this when there are more important things happening in the world. This is pretty pointless when in comparison. Why do we need a computer that runs on light. .. we don't need the matrix.
This is super amazing, but damn is it gonna suck when we run out of Indium
I only just found out about this experiment.
My main question is: what are the implications for our interpretation of Redshift?
Knowing that light travels through many complex particles and molecules, and with the increasing possibility that there are many plasma filaments everywhere, even though we can't see them, does this have an implication about time dilation and frequency sorting?
If there is an implication at any level, what would be the effects over the vast distances over tens of billions of light-years?
Regardless of all the potential applications for this technology, this is the first question that came to mind....
I have been amazed by the double slit experiment for as long as I can remember, but I would like to know more about how a device can shoot out a single photon/electron and have it detected. Why can't I find any video of someone doing this experiment? I'm not a conspiracy nut, but it seems like such an easy experiment to reproduce, but I have never seen it.
At 50 years old, I have no place starting in this plethora of unanswered questions that is quantum mechanics or even worse, entanglement. But for 8 months now, I've read every book and paper I can lay my hands on and I think I might just have something worth listening to. I'm not sure how to go about voicing my theory. Perhaps a psychiatrist, as my family has suggested?
Photon entanglement is being utilized for Quantum Computer at room temps. This material can be used to develop Quantum Computing Photon based chips for a new generation of processors.
Is this not still an experiment with light? Or can someone explain a little better how light can be a stand in for time? thanks!
Would the behaviour be similar or related for e.g. a (very) quickly rotating disc with slits arranged and timely interacting in certain configurations?
This experiment would be interesting when checking the result with a single photon, which I think is not possible today in the experiment in the video. Also because it would be possible to put sensors in the slits or reflectors of the disc, being able to check the validity of the "which way" information hypothesis. In any case, how will you check that the rotation speed of the disk is almost absolutely constant?
Why does cascading light necessarily mean the light is travelling as a wave and not just scattering particles kind of like water through a nozzle
Very interesting.
Interesting! In my opinion, in a double slit experiment both correlated photons are in initially in quantum phase sync, and off-set at the detector, causing interference; but they could start offset (time separated, but laser source keeps them quantum phase correlated) and interfere when absorbed at the detector, again with interference ... our Lab time emerges from local quantum phase periodic time (atomic clocks! and Einstein sync procedure!?) ... definitely interesting things to ponder upon and analyze :)
How would this explain the observation effect seen when the experiment is observed. If photons are offset at the detector as you suggest then what changes at the point of observation to cause the wave function collapse?
@@DD-oq5nn heisenburg's uncertainty principle, when you observe a quantum phenomenon you are measuring it, thus forcing it to collapse into a certainty
Rather than pulse the reflective surface to externally decompose the frequency spectrum of the laser, why not just vary (sweep) the frequency of the laser directly? Would it produce the same result? Changing the frequency of the laser is the same as changing the time element.
Does this prove the anisotropic speed of light, except that the speed is not static but rather a quantum wave function of possibilities?
This isn't a double slit experiment because both slots aren't available as a choice at the same instant. It by definition is something else.
The double slit experiment is the second strangest thing in the universe.
Very very interesting.
Disclaimer, I'm not a physicist or scientist, but I do sound engineering. My question is, how is this different than Frequency Modulation? To me it would seem that the pump laser is modulating the frequency of the probe laser with the period of its pulses. Therefore its adding upper harmonic complexities. I'd imagine the band pattern would change based on the change in the period between the pump laser pulses. In Frequency Modulation you have an operator oscillator of a specific frequency and then a modulator oscillator that changes the frequency of the operator frequency by the period of the modulator. When you increase the frequency of the modulator you increase the intensity and number of upper harmonic bands. So is FM or harmonic theory an application quantum mechanics in the time domain?
There is only one kind of space, but even that doesn't really exist because it presupposes a vacuum, which also does not exist.
Heisenberg, you did it again.
What will be the equivalent of quantum delayed choice experiment in time domain ?
That will make light to behave as particle not wave.
How do we know that what we are seeing is not just an effect of the pump laser light interacting with the probe laser light? The analysis proceeds as if the probe laser light is not even encountering the pump laser light, where in fact they are coincident on the surface...
Settling in for my first of many watches before I understand this
Fascinating. Ita damn good thing because if we knew everything and could model all of SpaceTime matter-energy in the way it works then this place would be kind of boring. I need bewilderment
Do we know what happens if we pass light through or reflect light on time crystals? What should we expect?