Dude, I have a PhD in quantum information theory, and I've never heard of these droplets. This analogy is absolutely beautiful. Even when it breaks down for other quantum numbers such as spin, it's the most elegant visualization I've ever seen to help you wrap your mind around the early problems of quantum mechanics. This should be shown at schools everywhere (with the proper disclaimer that there aren't always classical explanations for quantum phenomena). Loved your presentation!

@Tempus0

7 жыл бұрын

This might be quite a strech, but maybe this experiment can also explain spin. There are two components acting in the system: the droplet and the wave. The angular momentum from the droplet would be the 'classical' orbital angular momentum and the additional angular momentum from the standing wave could be the spin angular momentum. Quantization of the standing wave and frequency harmonics between the droplet and the wave might be able to explain why spin is limited to whole numbers and fractions.

@johnredberg

7 жыл бұрын

+Tempus0 Thanks for your comment, but I guess it is indeed quite a stretch. ;-) Spin is an inherent property of a quantum particle, independent of what potential it is confined to. A freely walking droplet would need to exhibit some spin-like features without the help of the effects coming from the surface wave interacting with the boundaries of a confinement (such as the experiment where there seem to appear "orbitals" in a quantum dot). While it is interesting to look for classical systems that exhibit quantum-like behavior, it's important to stress that there cannot be a classical theory that truly explains quantum mechanics. In simple terms "you cannot get rid of the weirdness in quantum mechanics". This fell a bit short in the video, I think. He seems to suggest at some point that you have the choice between "believing" in the deterministic pilot wave theory (in its original form), or the Copenhagen interpretation. You don't (x). (x) A classical theory must obey Einstein's principle of local realism. However, a result known as the Bell-Kochen-Specker theorem shows that no non-contextual local hidden variable theory is consistent with quantum mechanics. This has been demonstrated to be true in a variety of experiments. So, the pilot wave theory as presented in this video cannot replace quantum mechanics. But that wasn't the intention. The intention was to visualize some quantum phenomena in understandable classical terms. If you don't feel comfortable with the non-determinism of the Copenhagen interpretation, there is only one other consistent interpretation that I know of, and that's Bohmian Mechanics (or the de-Broglie-Bohm theory). It is deterministic and uses some kind of pilot waves, but it has the drawback of being contextual: For entangled systems, the measurement results in one apparatus depends instantaneously on the *settings of* the other apparatuses, no matter how far they are apart. In short, you're stuck either with collapsing wave functions, or with particles that can "feel" what's going on at any moment everywhere else in the universe. :-)

@Tempus0

7 жыл бұрын

Thanks for the explaination. My point is that in de Broglie-Bohm pilot wave theory, the waves are real. That open the possibility of assigning physical properties to the waves. A classical experiment will of course never fully represent quantum mechanics, but this experiment shows that there could be some comparisons between quantum mechanics and fluid mechanics. This is an interesting and so far (to my knowledge) unexplored new path. The weakness of the de Broglie-Bohm is of course that these pilot waves have never been verified in experiments. The Copenhagen interpretation has it's own short comings such as requiring the act of observation to collapses the wave function without being able to define what an observation or measurement is. Bell-Kochen-Specker theorem is about entangled systems, which I think have been a weakness of both theories. Regarding entanglement, I think Susskind's latest works on the topic is quite interesting. He also proposed some good arguments against the Copenhagen interpretations' 'observations' in that paper. A recommended read if you haven't done so already. Personally, I haven't paid to much attention to the standard interpretations of quantum mechanics. I've always preferred quantum field theory by Julian Schwinger.

@johnredberg

7 жыл бұрын

+Tempus0 Cheers, I was unaware of the ER=EPR idea as I'm "out of the business" for a couple of years now. Very fancy, but sounds interesting! As for the understanding of measurements, there have been a lot more insights from POVM theory, partly driven by the advent of quantum information processing and the study of decoherence in solid-state systems. Which is where I was working in. Basically the universe is associated with one giant wavefunction evolving according to the Schrödinger equation and all subsystems (including the measurement devices) undergo state transitions. But still, there is some randomness involved...

@bookender

7 жыл бұрын

Thanks for that information. I'm curious how we can be certain that spin is an inherent property of a quantum particle, rather than originating from a surface wave analog. Given that the analogy presented here probably cannot fully capture reality, I still wonder what quantum phenomenon (if any) might represented by the water surface here. Is it conceivable that whatever is represented by the water surface (Higgs field?) could impart spin to new particles?

*I like how he went straight into the topic, instead of having an intro* 👌

@duckcluck123

3 жыл бұрын

he had an intro

@thethirdjegs

2 жыл бұрын

It seems his later vids have longer intros. Or maybe because his recent videos are just more complicated.

@Wyatt1314.

2 жыл бұрын

Intro was so seamless & succinct, I seemed not to see it as well as Mr S. Morris stated.

@captainsquids2792

2 жыл бұрын

Intros are to play into the algorithm, it's something that has to be done at least occasionally

@albripi

Жыл бұрын

@@thethirdjegs they all do longer videos now to have better monetization by the algorithms of KZread. I believe must be over 10 minutes. It's a pity, shorter videos without useless fillings are the best.

I feel like a caveman introduced to electricity in a way that i understand.

@happysongs4kyrone

2 жыл бұрын

good analogy i rate it 10 watermelons out of 2 iron bars

@astronichols1900

2 жыл бұрын

@@happysongs4kyrone Ah, a man of culture

@superganjahleaf619

2 жыл бұрын

Even caveman understood "Fire Hot!!!" Give ourselves more credit.

@burthurt8365

2 жыл бұрын

This video had zero to do with electricity . One unit of electrification is called a Planck , not an electron . And is the crossing point of a transverse magnetic wave and a longitudinal dielectric wave crossing at right angles to one another and is one unit of electrification .

@Dogman_35

2 жыл бұрын

I guess it's a good analogy until someone goes out of their way to take it literally lol

The double slit has been haunting me since I first saw it in chemistry class 35 years ago. It blew my mind how something was both a wave and a particle. I can now sleep at night.

@J.A.huscher

Жыл бұрын

Yeah same. I will never know peace

@logic8673

Жыл бұрын

As someone already explained and Veritasium said so, it looks the same but it is not the same. For me, it does not explain the measurement, observer problem. Does it?

@altayoralarkaya2416

Жыл бұрын

@@logic8673 No it doesn't. Bell's inequality does and decoherence theory does.

@easports2618

Жыл бұрын

I mean is it that hard to imagine tho,just imagine a sperm cell but replace the head with a dot,simple stuff honestly

@JacobyStevens

Жыл бұрын

@@logic8673 My question about the observer problem is whether the mechanics of observation becomes interferant enough to disrupt the particles path along the pilot wave, or possibly disrupt the pilot wave itself before passing through one of the slits.

I feel most comfortable with a superposition of both the Copenhagen interpretation and the pilot wave interpretation at the same time.

@FOXTR0T1

7 жыл бұрын

I laughed out loud at this and then was asked what I was laughing at. It's awkward trying to explain quantum mechanics to someone so they understand a joke

@FOXTR0T1

7 жыл бұрын

I laughed out loud at this and then was asked what I was laughing at. It's awkward trying to explain quantum mechanics in under 10 seconds to someone who just wants a quick joke

@theonionpirate1076

7 жыл бұрын

+Copenhagen-Pilot Wave Duality. 10/10 I vote you for the Nobel prize

@thejoker696969

7 жыл бұрын

thanks I just spit soda everyplace...and no place at the same time 😎

@jensen333

7 жыл бұрын

+Crypto Joker did you manage to observe it, without the soda behaving differently?

My god! I finally get Quantum mechanics, @3:20, I saw a man who is bald and not bald at the same time!

@afromcpie1

4 жыл бұрын

It's "bald" but that made me laugh out loud

@Tazarus0099

4 жыл бұрын

This is the single best joke I have ever seen in a youtube comment. It's also true... That photo is eery

@jonnyking101

4 жыл бұрын

How do you know if someone doesn’t understand quantum physics? They say they understand quantum physics!

@SunriseFestival

4 жыл бұрын

Brooooo!!

@DragonFire360Media

4 жыл бұрын

You, Sir, have won the internet!

I can‘t even describe how much i liked that demonstration. We were doing the double slit experiment years ago at school, it recently popped up in my head again and haunted me since then. Especially how a single photon can interact with itself. This demonstration makes so much sense and gives me a greater understanding of what could be going on, it‘s just amazing.

This short video helped me understand quantum mechanics better than any 2 hour lecture I’ve seen 😂

@blundix

11 ай бұрын

And you seriously thought that 2 hours is enough for quantum theory? 😂

Common complaint: Bell's theorem rules out hidden variable theories. Response: No, it rules out *local* hidden variable theories - hidden variable theories are fine if they involve faster-than-light interactions. John Bell himself was a fan of pilot wave theories as this 1986 quote demonstrates "While the founding fathers agonized over the question 'particle' or 'wave', de Broglie in 1925 proposed the obvious answer 'particle' and 'wave'. Is it not clear from the smallness of the scintillation on the screen that we have to do with a particle? And is it not clear, from the diffraction and interference patterns, that the motion of the particle is directed by a wave? De Broglie showed in detail how the motion of a particle, passing through just one of two holes in screen, could be influenced by waves propagating through both holes. And so influenced that the particle does not go where the waves cancel out, but is attracted to where they cooperate. This idea seems to me so natural and simple, to resolve the wave-particle dilemma in such a clear and ordinary way, that it is a great mystery to me that it was so generally ignored."

@Adeith

7 жыл бұрын

How does the pilot wave interpretation handle entanglement?

@PublicCommerce

7 жыл бұрын

So the interactions would go backwards in time?

@sillyshitt

7 жыл бұрын

+

@osamakhader5667

7 жыл бұрын

I am not physicist but isn't faster than light interaction impossible according to Relativity theory? By the way, I like your videos and this video is great, but I am going with Copenhagen interpretation.

@brucesmitherson3545

7 жыл бұрын

I remember some article suggested that for entanglement to be possible the fluid should allow infinite sound speed

As always Derek, thanks for making something that’s intrinsically complicated seem so elementary, I wish all teachers shared the same passion you have for STEM!

WOW, I bow my hat to you. I believe you have just delivered the most intuitive and understandable introduction to quantum mechanics

For me this is Derek's most eye-opening video to date - totally thought-provoking!

@deathdoor

7 жыл бұрын

Robin Nixon And for me "aaaaaaAAAHHHH" provoking. My brain don't think, it just screams when I watch these videos.

@vaibhavgupta20

7 жыл бұрын

Robin Nixon you should watch pbs space time.

@eyad116

7 жыл бұрын

true

@vaibhavgupta20

7 жыл бұрын

anubhav rai what??

@TheSam1902

7 жыл бұрын

eyad gomid truely true

Is it crazy that pilot wave dynamics gives me an inner peace and the Copenhagen interpretation fills me with a mild anxiety?

@BoundlessPLYR

3 жыл бұрын

Nah I feel something similar, wether it's correct or not in the end it is simply intuitive

@achdetoni5008

3 жыл бұрын

Pilot wave does not explain why the double-slit experiment results in no interference pattern if one measures which slit the electron went through. It is mainly a visual represantation.

@giles4565

2 жыл бұрын

@@achdetoni5008 Slightly different phenomena, it is due to hesnburgs uncertainty principle which comments on our ability to measure a microscopic object without disturbing it. Given that these particles are much larger we can observe them without disturbing them.

@achdetoni5008

2 жыл бұрын

@@giles4565 Dude, you can't even write Heisenberg, it shows that you never looked up what you are talking about.

@giles4565

2 жыл бұрын

@@achdetoni5008 Grammar is a brilliant rebuttal to any argument, as always.

This reminds me of work by David Bohm which I first came across a few decades ago in his book "Wholeness and the Implicate Order". There are a number of videos now about this interpretation of Quantum Mechanics such as : David Bohm's Pilot Wave Interpretation of Quantum Mechanics. Your video of macroscopic behaviour of oil drops in a an analogous way really helps illustrate this. Thank you for making this subject more widely known.

@UnlistedAccount

Жыл бұрын

Pilot waves were first proposed by Louis de Broglie 1927.

@cygnus_zealandia

Жыл бұрын

Yes, I do like the Pilot Wave theory, thanks Ve and "first REPLY person".

@charliekirkland6040

9 ай бұрын

​@@UnlistedAccountit was then picked up again by bohm in the 50s

3:40 "The Copenhagen interpretation excludes anything that cannot be observed". Its central object is the wave function. By definition, the wave function cannot be observed. A bit ironic isn't it ? Great video. Wish there were more content on alternative interpretations !

@davidhand9721

2 жыл бұрын

The Copenhagen folks were big into irony like that. They claim that information is conserved, but upon observation, the integral plog p dx where p is |Psi(x)| squared, being the entropy of a continuous distribution, is clearly changed. The Born rule is also, notably, totally in contradiction with the Shrodinger equation, and both are supposed to dictate the time evolution of a system, but no one can say exactly which one to use when unless we use weaselly language like "measurement", which no one can clearly define. I've been done with Copenhagen for a long, long time. I've moved on to Everett's many worlds. It sounds crazy until someone explains exactly what it is; it's the application of Occam's razor to Copenhagen, there is no collapse, there is no Born rule, only the Shrodinger equation and decoherence. There's no "splitting" or "branching", there's no world where the whole universe is shrimp. Just the Shrodinger equation, which describes the time evolution of the wavefunction at all times, and decoherence, which determines what parts of the wavefunction can interact and which cannot. I'm very close to being certain.

@oriongurtner7293

Жыл бұрын

If you think that’s nuts, just wait, the wacky-doodle-screwball nature of reality in terms of quantum mechanics just gets messier, here’s a goodie Quantum mechanics is, according to itself, “free of hidden variables” in its Except it not only uses them, it ends up _creating them_ in the process

"Any uncertainty is due to our ignorance" this is the golden statement...

@biljanapercinkova318

4 жыл бұрын

"Any uncertainty is due to our ignorance" (5:02) ) is actually a reflection of Einstein's (and David Bohm's) Hidden-variables theory in which they state that the quantum mechanics is an incomplete description of reality; there are hidden variables (not known to us yet) that cause the results to be probabilistic and not deterministic. Had we known these hidden variables, the results would be deterministic and not probabilistic. Einstein objected the fundamentally probabilistic nature of quantum mechanics declaring "I am convinced God does not play dice". (Bell's theorem would later suggest that local hidden variables of certain types - a possible way for finding a complete description of reality - are impossible without introducing non-locality into the picture. This would contradict Einstein's cosmic speed limit which is the speed of light.)

@BarryKort

4 жыл бұрын

@@biljanapercinkova318, the experimental demonstration that Bell's Inequality does not hold in our cosmos does indeed rule out the most trivial kinds of hidden variables. In particular, the hidden variable cannot be a property that is a constant in time. The hidden variable must at least be some time-varying property. Moreover, we must also discard the simplifying assumption that time-keeping is the same everywhere and everywhen in the cosmos, so that a single scalar parameter, t, would otherwise have sufficed to specify the time (or age) of all particles in a set of correlated (e.g. "entangled") particles. We know (from both Einstein's theories and actual measurements with precision atomic clocks) that time-keeping is local, so that distant particles age (e.g. oscillate) at their own idiosyncratic rates. They manifestly do not remain in any kind of perfect phase-locked synchrony. Once we abandon such simplifying assumptions, we realize that the (time-varying) hidden variables no longer perfectly cancel out in the middle of Bell's derivation. Instead, we are confronted with a non-vanishing "beat frequency" term. That is, the not-so-hidden variable is time itself. Rather than "spooky action at a distance" we really have not-so-spooky time-keeping at a distance. This is why Bell's Inequality does not hold in our cosmos.

@biljanapercinkova318

4 жыл бұрын

@@BarryKort Love your answer, that’s wonderful, no spooky action on distance of course. As Wittgenstein would say, everything is here for us to see. Roger Penrose’s example is also indicative - two balls, black and white, wrapped in boxes; two friends each one having a box. One of them travels to Boston, opens his box and discovers he has the black ball. Immediately (without spooky action) he knows that his friend has the white one - their local time preserved. I shall certainly quote you in the next edition of my book „102 Hours with Charles Berner - Small Amount the Heart Has Managed to Remember“ (www.amazon.com/s?k=percinkova&ref=nb_sb_nos. I discuss there “the beat frequency“ mentioned in your comment in regard to muon particle, together with some easy math.) Rightly you emphasize "in our cosmos". It seems very Gödel-like to me that Einstein’s hidden variable (meant to preserve his local reality and speed limit being the speed of light) might be the Time itself - and Einstein remains the greatest master of Time. He was certainly aware of the confines of “t” in science when he wrote about NOW. Lee Smolin in his book “Time Reborn: From the Crisis in Physics to the Future of the Universe” says: "…More and more, I have the feeling that quantum theory and general relativity are both deeply wrong about the nature of time. It is not enough to combine them. There is a deeper problem, perhaps going back to the beginning of physics."

@BarryKort

4 жыл бұрын

@@biljanapercinkova318, when Bell published his inequality in 1964. Einstein was long dead so he was not there to point out Bell's unrealistic simplifying assumption. Worse yet, Bell's paper languished unnoticed for at least another decade. The obscure journal that published it only lasted for that one volume before going defunct. What baffles me is that once Bell's paper resurfaced, why did no one point out that his derivation only works for hidden variables which are constant (i.e. not time-varying). After all, the locality of time-keeping was reasonably well known by the 1970s.

@BugRib

4 жыл бұрын

Jeremy Mettler - WTF?

no background music. nothing to dictate your emotions towards the video. just a video which gives information concisely and effectively. AWESOME!

@hichaelhighers

2 жыл бұрын

What's so wrong about background music lmao

Commenting again for the algo and to say, pleeeeease do more along these lines! You have given the most insightful explanation I've heard since reading about the double slit experiment in Six Easy Pieces. World class teaching here.

This was exceptional. I've been watching and reading everything that crosses my path for 20 years and never seen something that made it all click quite like this unless it was gospel. I think u r on to something absolutely beautiful

I don't think I have a preference for which interpretation that I like, but I understand the pilot wave interpretation almost instantly when coupled with the visual learning tool of silicone oil. For the first time, the double slit experiment doesn't baffle me.

@EPP-ju6vq

7 жыл бұрын

Lutra Nereis i most like this One but superposition is coller

@EconoChallenge

7 жыл бұрын

Thank you. Could not have put it better myself.

@TheHefter

7 жыл бұрын

If double slit experiment doesn't baffle you, it's not good news

@Kanglar

7 жыл бұрын

If the double slit experiment doesn't baffle you, look up the delayed choice quantum eraser.

@enhydralutra

7 жыл бұрын

Kanglar Yes, that one still baffles me. XD

It's one thing to study a subject and be able to imagine these concepts but having it explained so conceptually and linearly is a certainly appreciated and well thought out way of education. Good job mate I love it.

@timrattenbury5321

4 жыл бұрын

Aussie?

@ojasdighe991

4 жыл бұрын

@@timrattenbury5321 does it matter?

@ojasdighe991

4 жыл бұрын

The content's awesome anyways,right?

@austineli325

3 жыл бұрын

"The layer never shrinks to about 100 nm which is required for the drop to recombine with the oil" Drop recombines with oil 0:30

5:56 this is the first time I've seen darek stutter. It's not bad to see him being a human once in a while lol. Loved the vid!

Perfect description IMO, there is no need for me to go deeper, you explain this 100%

So instead of having something messy and difficult to grasp like wave-particle duality, we instead have a particle that creates a wave in whatever underlying field it corresponds to, and that wave will affect the particle. Finally, a simple and intuitive interpretation of quantum mechanics. Guess that means it'll end up being wrong with my luck.

@TheDanubeDepleter

4 жыл бұрын

Tis the power of the wavefunction collapse

@AZCaveMan480

4 жыл бұрын

And this is only a small part of quantum mechanics! A lot still can't be visualized

@otaku-chan4888

4 жыл бұрын

Too bad the wave function collapse messes it up...

@alexleung842

4 жыл бұрын

Too bad the scientific community wants to shove Copenhagen down everyone’s throats and dedicate little to no funds to researching the possibility of bohmian mechanics further. I predict that 1000s of years from now our lack of following this possibility will be looked back on as one of humanity’s greatest blunders.

@petsan97

4 жыл бұрын

@@alexleung842 I mean, has that not been the scientific community's problem since, well, forever. Even the best and brightest have a tendency to ignore the blatant flaws in a theory and preach it as fact leading to even more people listening and doing the same. An appropriate example being Einsteins refusal to accept the limitations of classical mechanics.

0:13 imagine hearing that in a dark alley at night.

@Jellyfishhie

7 жыл бұрын

watch?v=W6WO5XabD-s

Wow, this REALLY helped me digest and understand a lot of what I had already heard about Pilot Wave Theory. Amazing analogy, thank you!

Brilliant video that makes complete sense and which I understand! I'd go for the pilot wave theory. Thanks for making it so easy to visualise

I like how towards the beginning there was a group of of drops that "bonded" together while still being seprate drops to form a more stable enviornment

@LILOEVERYTHING

7 жыл бұрын

1:13

This is the very first time I see someone showing that the discovering of the quantum mechanics doesn't actually exclude the idea of a deterministic universe. That's what I've always tried hard to explain to my friends, and you did it in a very simple way. Just subscribed, congrats!

Fascinating and enlightening. Thank you Veritasium!

It’s interesting how similar the droplet travel is compared to the Alcubierre warp drive. Maybe instead of warping space and time we could isolate it and position ourselves out of the center of the isolation wave to get momentum in a specific direction?

I have to say that the pilot wave theory is something that my brain is capable of accepting much easier than standard quantum mechanics, so for now, that seems like the 'better' theory for me :-)

@veritasium

7 жыл бұрын

but... pilot wave theories are explicitly non-local, meaning they require interactions faster than the speed of light. This is because they take the position that objects really exist when you're not looking at them. Statistical interpretations try to get around this by denying the existence (or otherwise ignoring) what's happening when you're not measuring.

@randy52000

7 жыл бұрын

Veritasium isn't interaction faster than light something already confirmed by quantum mechanics?

@randy52000

7 жыл бұрын

Veritasium as in quantum entanglement

@tomatensalat7420

7 жыл бұрын

But if the fields which vibrate actually exist, then I don't see much of a problem with non locality. Since the wave contains the information it only looks like the information travels faster then light doesn't it?

@thisislotus6215

7 жыл бұрын

I dont think faster than light interactions are too hard to grasp, after-all thats how quantum tunneling works? Maybe people are thinking about this wrong, what if your ability to be entangled with particles (collapsing the wave function) was relative to you , and when systems who are no way entangled overlap a decisive location is 'decided' relative to all entangle particles. Though this would suggest if you could do the opposite and take systems apart to where they aren't entangled to each other, whatever quantum uncertainty that could be made would be random every time these systems meet back to entangle again. Interesting enough I've never seen these experiments use two observers, or wave collapses on both ends of the experiment, though I dont know how realistic this is to test anyway.

Mind Blown! The Copenhagen Theory explains everything via mathematics, and that's what made people's eyes glaze over whenever "Quantum Mechanics" gets mentioned. The Pilot Wave Theory is not only elegant, but actually -- dare I say it -- *Inspirational*. It makes people want to know more. So, even though the Pilot Wave Theory might be proven to be inaccurate someday, it's a great "teaser" into Physics. And when someone gets interested enough, they can proceed to learn all those difficult mind-numbing Quantum maths. Now, personally I prefer the Pilot Wave Theory. It's not only more intuitive for me, but I really like how it removes the inherent randomness of the Copenhagen Theory, and returns to the deterministic principle.

@VYScuti

7 жыл бұрын

Pandu Poluan whether or not the deterministic principle is an actual product of quantum mechanics is left to debate, but if it is in fact deterministic then maybe the theory of everything can be formed with unification.

@ogbizi

7 жыл бұрын

Paused the video at 3:10 to comment on this, scrolled down and saw you already had. Replying to save for future reference.

@shadowboyii

7 жыл бұрын

man you just stole my world and I totally agree with you especially that because it removes the random aspect something that annoyed me for a long time and make understanding this subject a lot harder for me its never make any since for me. random position how can it be?? after this video I can relief my mined from this subject ...... well not really its a theory after all

@lawofeffect

7 жыл бұрын

Nature is under no obligation to make sense to you. Science is about what is actually true and isn't about what you prefer to be true.

@PeregrineHawthorn

7 жыл бұрын

Physicists don't study the universe, and any physicist that says they do is dramatically simplifying things for you. A physicist studies models of the universe. They routinely test these models for predictive accuracy, but in the end, physics is a descriptive study that has no tools for describing why or how the universe operates, only what it might do next. This is why most of determined physics has laws, not theory. The question is not "why does the apple fall toward the ground?" but "how can I model that fall, given what I can measure?"

2:59 Wow ! I have never seen this , and that pattern coming out of something on the macro scale is just awesome !

This is one of my favorite videos. Love re-watching it

I wish I had access to such beautiful videos when I was in high school. There’s no telling how many people of my generation, myself included, would have been inspired to pursue higher physics if only we had such videos to help wrap our minds around the fundamentals of quantum mechanics. But I’m happy the current generation has all of these. These make me feel optimistic about our future as a species and as a planet.

@write2pras84

2 жыл бұрын

@@DrDeuteron Maybe but I am talking about a lack of inspiration. A trigger, if you will. Some people are inspired by reading but others are inspired by visual representation.

@BL-xz3ym

2 жыл бұрын

@@DrDeuteron Hey buddy, first of all quantum is notoriously incomprehensible, to the point that Feynman himself joked nobody who thought they understood it actually did. How about you don’t go around putting people down for benefitting from a mental model that helps them understand a concept better? Nobody is saying this video is a full understanding of QM, it’s a damn learning tool. If I went and told you that you’d never make it in the field if you’ve ever represented an electron as a dot in a Lewis structure because they’re actually waves, or if you’ve ever used any model whatsoever for that matter, you’d rightfully look at me like I’m a facetious idiot. Stop being that guy, they’re learning tools, not full pictures.

@borntowitness6316

2 жыл бұрын

@@DrDeuteronI see, youre very brilliant. Didnt even recognize he talked about being inspired as a kid/teenager and has nothing to do with learning itself. But keep on destroying ppls motivation for no reason to keep your self confidence high.

@samiitroorkee7614

2 жыл бұрын

@@DrDeuteron Dude what are u doing here instead being in a lab,research center or whatever! Get Outta here ,you highly intelligent,dominating freak😂. This is common man's space

@borntowitness6316

2 жыл бұрын

@@DrDeuteron then its not the right way and I hope you were treated better.

Dude just made me understand why electrons end up where they do in the double slit experiment. I never really understood why the path changes before this.! Thank you :)

@h-manhayden706

4 жыл бұрын

Exactly

@sinclairal

4 жыл бұрын

This doesn't explain delayed choice quantum eraser. Stuff is crazy.

@danielcalabrese5769

4 жыл бұрын

It doesn't explain the double slit experiment because when we observe or measure the electrons going through the slits they end up acting like soild "things" and leave two lines on the back wall, it's only when we do not observe them as they travel and only measure the end result when they form a interference pattern. So if we watch it moving it acts differently to if we wait and only measure the results. That's what makes it so crazy. In this video we can watch the drop as it moves and it still has the same results if we don't watch it. I hope you understand

@decibel333

4 жыл бұрын

@@danielcalabrese5769 yes but I always understood that to mean the methods used to sense the photons/electrons at the slits added energy/modified the energy of the particle and so *of course* the result is different. Not saying the pattern makes any sense to me tho

@danielcalabrese5769

4 жыл бұрын

@@decibel333 yes I understand what your saying and its a valid question, in the experiments that I read about or watched on video they explained that they made sure that their measuring equipment had no effect on the experiment. It is a very interesting and thought provoking experiment. 👍

Awesome new visual and perspective for the mind stew! I've always tried to understand the double slit deal by imagining that the particles were interacting with their counterparts from parallel universes.

This is brilliant! Thank you for the demonstration and explanation.

I thought the Copenhagen interpretation isn't very popular among physicists. This is a great way to visualise quantum affects though.

@veritasium

7 жыл бұрын

not so sure pilot wave theories are the standard way to teach. We certainly talk about wave-particle duality and wave functions, but when it comes to "what's really going on," the idea that particles are bouncing on waves and being deflected is less well taught

@xxGLhrMxx

7 жыл бұрын

There is no majority interpretation. Copenhagen is adopted by about 40% of academia. I believe it is followed by the Informational and Many Worlds interpretations

@jmniskanen

7 жыл бұрын

Going through physical chemistry in a university right now, and the Copenhagen interpretation is what we're going with despite its problems but because of its usefulness in explaining chemical experiments such as different methods of spectroscopy.

@tomdodd5442

7 жыл бұрын

I'm studying physics at uni and Copenhagen is definitely the mainstream interpretation. The pilot wave theory may make you feel better about quantum mechanics at first, but actually doing calculations with it is so ridiculously difficult that everyone uses Schrodinger's equation. Which interpretation you like is up to you, as the interpretations all predict the same results. The only difference is that the pilot wave theory is incredibly clumsy mathematically.

@MoronicAcid1

7 жыл бұрын

Veritasium Well they wouldn't teach about electrons bouncing on waves, but rather riding then in 3D space. Also, pilot wave theory may be correct, but it is not useful to talk about unless we find the capability to observe the whole universe. The initial wave can be thought of as a seed for a pseudo-random number generator, which will appear random to the observer unless the seed is known to that observer. From knowing the whole state of the universe, and with enough computational power we should be able to find the initial conditions of the wave.

What, no? It's doesn't come down to which you prefer. It comes down to which one is supported by the available evidence, and if the data doesn't support one over the other, then the answer is you don't know. Uncertainty isn't an excuse to pick the option you're the most comfortable with.

@tomdodd5442

7 жыл бұрын

True if anything, if you really don't know which one is correct (i.e. if the choice of interpretation does not matter), then I always go with the one that's easiest to use, and that's Schrodinger's equation and the Copenhagen interpretation.

@viermidebutura

7 жыл бұрын

Tom Dodd in that case you go for the one which require the least amount of unknowns

@tomdodd5442

7 жыл бұрын

viermidebutura There are just as many unknowns in the pilot wave equations as there are in the Schrodinger equation. The difference is that Schrodinger's equation is much easier to solve.

@viermidebutura

7 жыл бұрын

Tom Dodd also the pilot wave explication requires faster than light information transfer which is a big no no

@tomdodd5442

7 жыл бұрын

viermidebutura Yes, which, as you say, is a huge problem. There is currently no relativistic pilot wave theory.

Awesome video! Regarding the double slit experiment though, isn't the point of the wave function breaking down when measured not that it "changes" from a wave and defaults to a single location when it hits the back wall (easily visualized by the behavior of these bubbles), but that the actual distribution of where these points hit changes. You measure at the back wall, and you see a wave form distribution of points. You measure at the slits, and you see only 2 clumps relating to those slits, implying that it's just a wave until it's measured, and just a particle (with no wave feature influencing its behavior) after it's measured. Not questioning your video in any way, just think this stuff is super interesting and trying to understand. Thanks!!

Love your videos! Keep them coming please! You make science fun!

I'm answering questions here and also in a Reddit /askscience with the MIT prof who did this research: bit.ly/VeRoil

@nesirsitsir

7 жыл бұрын

Can I get a shoutout from Derek! You would make my day man. And a question if I could ask one, how smart can we get? (This may be more a VSauce-esque question but I think it would be a cool topic).

@abrahamvivas9540

7 жыл бұрын

This experiments can reproduce the "complete" double slit experiment, i mean, when the "particles" (droplets) are "measured" they do NOT produce an interference pattern?

@sehornesminn501

7 жыл бұрын

Could you explain why the droplet crossed the barrer and what are those barrers made of? Thanks :)

@yourlydontknowjack

7 жыл бұрын

obviously not, measuring the particle would mean "observing" it's position, by any means - which we are doing by just looking at the surface they're bouncing on. the pilot-wave interpretation doesn't work the way the copenhagen-interpretation works, observation and measurement have not the "dramatic" influence there, although every physical measurement would certainly interfere to a certain extend it would not lead to the destruction of the droplets quatum-esque behaviour

@veritasium

7 жыл бұрын

shoutout man! And I will think about how smart we can get, maybe for a new video with Michael...

I should be making homework right now, but this is way more interesting... ^^'

@kapildeshmukh7878

7 жыл бұрын

It suits me, because I'm currently studying Young's double slit experiment in Wave Optics 😁😁😁

@aRoamingDuck

7 жыл бұрын

singingblueberry I think Making homework is less useful then watching this. Doing your homework may be a good idea though.

@kapildeshmukh7878

7 жыл бұрын

When you love quantum physics so much, you don't complete homework, you start making it.

@jiainsf

7 жыл бұрын

Maybe he/she is a teacher. Making, not doing, homework would be sensible

@aslakskailand2589

7 жыл бұрын

same....

Beautiful. I'm a bit worried about the misconceptions it could introduce, but it's certainly a great teaching prop

@lazypig93

2 жыл бұрын

It’s no worse than the tennis ball analogy, which wave isn’t even being mentioned.

When I first heard the wave-particle duality, it made me think that should be because the waves are created by electrons. The electrons are particles, and they travel with their waves. This demonstration you made, perfectly explains this duality. I love the beauty of your demonstration and the potential paths it opens for deterministic atomic physics. Taking it to the extreme, it may even lay a foundation for the long sought unified theory (just dreaming big). Thanks for sharing!

@charliekirkland6040

Жыл бұрын

It is a cool interpretation, the problem is that physicists have had trouble reconciling pilot wave theory with relativity among other things, the theory just doesn't hold up compared to coppenhagen or many worlds, doesn't mean it can't though.

@chriscurry2496

11 ай бұрын

@@charliekirkland6040 … that’s not really correct. Copenhagen, in reality, is not even consistent with itself. It should be totally disregarded at this point. Many Worlds is a little silly, imo: so two pictures remain that seem perfectly consistent with experiment: the Bohemian non-local picture, or the Transactional Interpretation (which some modifications, as desired).

This makes MUCH more sense than other explanations I've seen of the quantum behavior behind the double-slit experiment. OF COURSE the electron is going to interact with the EM wave created by its own movement, and the field created by electrons in the matter making up the slit. I'm not a theoretical physicist, so I've never had much use for the idea of an electron existing ONLY as a non-deterministic wave function in all possible positions until it's observed.

@donserna4456

4 жыл бұрын

It is when we understand "the wave" and its relation to the droplet. It is not the droplet rather the wave and the power of the wave. When the droplet can turn back into the wave thereby effecting the power of the wave only then can we say random theory applies. It is not random if the wave is the constant. Things that make you go Hmm..

I have been watching PBS spacetime for a long time and they have a lot of vids about Quantum Mechanics. But you visualistaion finally explained me what is going on and i can imagine evetrything that is said at their chanel XD Thanks!

@MoronicAcid1

7 жыл бұрын

Pszexs It might not be true, which you would find out if you watched the whole video before commenting.

@Pszexs

7 жыл бұрын

I watched the whole wide before commenting. And I know it is just visualisation and simple explanation but still it helps a lot when you want to understand quantum mechanics when you are 18 and you didn't have physics lessons for 2 years. I'm fascinated about the maths and physics but at school I participate extended biology and chemistry classes only.

@Evello37

7 жыл бұрын

This is only a visualization of the pilot wave theory. The widely accepted Copenhagen interpretation does not operate like the droplets in this video, so you'll need to look elsewhere if you want to understand that model. It's a lot more probabilistic and unintuitive.

@TheKoelnKalk

7 жыл бұрын

which means you didn't understand it

@poketopa1234

7 жыл бұрын

Well remember this is only a theory. Generally (and what's talked about on spacetime) people talk about the Copenhagen interpretation. This theory is only a possible, but not popular, idea of explaining quantum results.

This is an absolutely stunning demonstration!!!

This is still my favorite Veritasium drop! ❤️

I just realised something, 0:33 this is similar to an EM wave, the oil droplet is equivalent to the electric field oscilating up and down, and the standing wave is equivalent to the magnetic field oscilating side to side, causing it to propogate itself in one direction

@Lac0na

7 жыл бұрын

except the most important point of this demonstration is that the droplet interacts with the waves it creates, whereas an electron cannot be affected by its own electromagnetic field

@The_Story_Collector

7 жыл бұрын

+Lac0na perhaps actually looking at what you are reading, before you go to say someone is wrong, would be beneficial to you in the future, because I clearly never said it acts like an electron, I said that it atleast somewhat acts like an electromagnetic wave

@x0acake

7 жыл бұрын

+Rough Boulder I think you mean the oil droplet acts like a photon. The air is the electric field, and the oil is the magnetic field. Together, they are equivalent to the electromagnetic field. The oscillation in both is equivalent to an electromagnetic wave.

@The_Story_Collector

7 жыл бұрын

that's what a photon is though, an electromagnetic wave, atleast when it is a wave.

@Luisitococinero

7 жыл бұрын

It's an interesting coincidence.

the Copenhagen interpretation is like when you’re taking a language test and you don’t remember if the accent goes like é or è so you just put ē and hope the teacher doesn’t notice

@justinnehls4212

5 жыл бұрын

Lol

@zakaryamamouni6078

5 жыл бұрын

xD

@mikloshegedus2398

5 жыл бұрын

The particle statistical wave model is the core idea of quantum mechanics and ion thrusters.

@mariagiacometti1247

5 жыл бұрын

@MrGoodkat .

@somachakraborty9952

5 жыл бұрын

I'm sorry but this is how the universe is

It's not about what you are more comfortable with. You just need to acknowledge that there are multiple competing theories and you do not need to settle for one or the other until further empirical evidence is presented that would lead to a decisive conclusion.

@cyrushafezparast8969

5 жыл бұрын

This

@maruchannuudle657

5 жыл бұрын

I think this needs to be a quote, like the ones you find when you google “quotes on stuff”. Because this needs to be embedded into the minds of everyone.

@jpdemer5

5 жыл бұрын

The key question is, can any experiment be devised that will distinguish between the theories? If not, it really does come down to what you're comfortable with - or which mathematical tools best serve your particular purpose.

@Leoninmiami

5 жыл бұрын

I'm "uncomfortable" with imparting magic into my science. pretty much every word used to describe Copenhagen interpretation can be interchanged with "magic" without loosing any understanding. example ... how does a wave collapse and a particle appear .... hummm its magic! When you say "wave" what do you mean? when we say wave we mean hummm "magic" of probability. And lets not even start on "superposition". So yeah, if a theory pretty much asks you to dispense with reality and accept magic I'd feel a bit uncomfortable. God doesn't play dice!

@MrTrevortxeartxe

5 жыл бұрын

@@Leoninmiami did you literally just say you're uncomfortable with imparting magic into science, and then make a claim about a god? Seriously?!

And De Broglie's Pilot Wave Theory is exactly what I believe is happening

This is so fantastic! I am a Physics enthusiast and I have never seen this analysis before..So exciting and brilliant! ❤🇧🇷😘

I absolutely _love_ this idea. To me, the pilot wave theory makes so much sense and requires far fewer leaps of logic than trying to resolve that particles are somehow in two places at once. Unfortunately, I can't help but think the theory is still incomplete, as there might well be variations of the double-slit experiment that rules this out.

@guntguardian3771

2 жыл бұрын

The issue you face here is that it does not explain how wave function collapse occurs once a measurement has been made. Nor does it explain away Bell's Inequality.

@stupidaf4529

2 жыл бұрын

@@guntguardian3771 the particle is causing the wave. Measuring the particle (ie. touching it) interrupts the vibration which causes collapse (just thinking out loud, no expert)

@guntguardian3771

2 жыл бұрын

@@stupidaf4529 It doesn't explain Bell Inequality, which is only explained so far by super position rather than a pilot wave.

@MassDefibrillator

2 жыл бұрын

@@guntguardian3771 As Derek pointed out in another comment elsewhere, Bell himself was a fan of pilot wave theory. His theory only discredits Local hidden variables; it does not discredit pilot wave theory. Pilot wave theory makes exactly the same predictions as standard quantum mechanics as long as quantum equilibrium is always maintained. Both theories are fundamentally based on the Schrodinger equation.

Oh hey, it's Dirk from veritablium!

@jonnyhille

7 жыл бұрын

Hello fellow TIM

@juliand.1147

7 жыл бұрын

HI joke =)

@veritasium

7 жыл бұрын

flaggy flag for life

@froidesprit

7 жыл бұрын

Veritasium I am from the club and claws party.

Cool. Like Wave-Particle duality. Beautiful.

Great way to understand the pilot-wave idea. Many thanks.

My first thought: is there something where the two theories would have DIFFERENT predictions, which could then be tested?

@espadrine

7 жыл бұрын

The equations for the electron are identical. However, the wave it would presumably be riding, currently unknown, could be detected in the future, kind of like the positron was presumed to exist before it was detected in the real world, or like how the Higgs' boson was presumed to exist before we had some amount of certainty.

@TulipQ

7 жыл бұрын

+AyyElMao What about the quantum eraser experiments?

@v4nadium

7 жыл бұрын

Actually there are not *theories* but rather two *interpretations* of quantum mechanics. The math is the same for both (eg the wave-function |Ψ> in the Copenhagen interpretation *is* the same as the pilot-wave in the de Broglie-Bohm interpretation.)

@TulipQ

7 жыл бұрын

Ah, so these ideas aren't predictive, they are just efforts to make natural language explanations of the same predictive equations?

@4ltimit1

7 жыл бұрын

darn

You open my eyes a little bit more every single video you release. Keep them coming!

This is a phenomenal video! Nobody talks about these pilot wave theory! Eye -opener! I love it !

I’ve watched hours of videos about the double slit experiment and read so many articles just wanting to understand and never really getting it… until this video. This actually makes sense.

For me 4:48 is the right explanation "pilot wave goes through both slits and droplet (electron) through one". Moreover, while trying to measure or see the electron, it starts acting like a particle meaning that the tool measuring disrupted the waves it was riding on. For me it is the simplest and right explanation. And this experiment visualizes it very well.

@NotStellarNoja

6 жыл бұрын

Muuip. The problem I see with the idea that measuring the position of the particle disrupts the wave particle interaction and giving two groups instead of the interference pattern , is that if you perform the delayed choice quantum eraser experiment, you still measure every particle, but when you erase the knowledge of which path the particles took the interference pattern returns.

@yash1152

6 жыл бұрын

Agreed

@yash1152

6 жыл бұрын

noja83 I didnt understood what u said. Can u please explain the theory that I need to get acquainted with to understand what u meant.

@NotStellarNoja

6 жыл бұрын

Yash Pal Goyal The delayed choice quantum eraser experiment. I believe Space Time has done a video on it. Quantum entangled particle pairs are sent through the double slit and a device is used to redirect and measure the paths they take, but in this it's possible to remove some of the results. When these results are removed it "erases" our knowledge of which path the remaining particles took, which amazingly, causes the wave pattern to return.

@NotStellarNoja

6 жыл бұрын

This sort of eliminates the possibility that measurement of the particle stops the interaction between the particle and the wave shown in this video resulting in two groups behind the double slit instead of the interference pattern.

Brings up the notion of the aether as the wave medium.

@P0LARice

7 жыл бұрын

Andrew Vida #TeslaWasRight

@Polack21

7 жыл бұрын

Try to harmonize the possibility of quantum mechanics asserting the existence of a wave medium/aether with the accepted interpretation of the Michelson-Morley experiment. The implications would have conspiracy theorists frothing at the mouth

@eddiepadilla1078

7 жыл бұрын

+andrew vida Higgs Field, anyone?

@aezakmei

7 жыл бұрын

I know right? Maybe Tesla was right after all

@gaspardsagot628

7 жыл бұрын

Brings up the Michelson-Morley experiment too. Aether is one of those things we invented just to fill gaps, just like the cosmological constant, and not improbably dark matter

This visualization is actually very thought provoking for how things might work throughout our universe.

Thank you so much! This short video is a big gift to humanity right now.

When you get a Veritasium ad before a Veritasium video.

@xl000

7 жыл бұрын

What's that "ad" you're talking about ? Haven't they been extinct for 8 years ??

@gabuks1

7 жыл бұрын

Nice minecraft avatar. scrunt

@Letham316

7 жыл бұрын

I noticed that as well. I clicked to skip, then when the video started, I was like "oh snap, it's the same guy".

@michagrill9432

7 жыл бұрын

MenexGaming What do you get if you add an ad to an ad? Adception :P

@patrick-sprachenmusikstudi5351

7 жыл бұрын

When you get a Veritasium ad for a Veritasium ad before a Veritasium video.

The Pilot wave theory reminds me of how crazy of a concept it is that electromagnetic waves don't need a medium to wave through. It's like an ocean wave but water doesn't exist. Paradoxical

Great video, thnak you for that great analogy! It's goona be greate to see video about time crystal.

It’s about time that someone else thought of this. I had this exact same visual about 15 years ago after reading Brian Greene’s book, Elegant Universe.

Woah! Pilot waves seem pretty legit. I’ve always had a hard time accepting the Copenhagen interpretation. Great video! 🤘🤯

@matthewrogers8416

5 жыл бұрын

i feel the same way!

@studmalexy

5 жыл бұрын

never trust the Danish

@cyrushafezparast8969

5 жыл бұрын

Just so that you are aware, there's about as many interpretations of quantum mechanics as there are people seriously thinking about interpretting quantum mechanics. For example, there's at least 5 times as many people who buy into Everettian QM and...erm... if you look into that one ... you might not like it as much. But at least Everett tells us that time exists and space is something that we travel through! And then you hear about Carlo Rovelli...

@cyrushafezparast8969

5 жыл бұрын

All of that is just a reminder not to let confirmation bias/relief that the world might actually make sense do the thinking for you :)

@Leoninmiami

5 жыл бұрын

His feelings of "ignorance" where shared by Einstein and John Bell. He is in good company.

quantum mechanics: forget everything you knew about standard physics.

@nimim.markomikkila1673

7 жыл бұрын

Quantum mechanics has been a long time part of standard physics. It just cannot be explained fully yet:)

@ReubenLL28

7 жыл бұрын

yeah, but you're not likely to be taught quantum mechanics in high school physics courses, and quantum mechanical systems don't behave at all like we intuitively think the world should work.

@viermidebutura

7 жыл бұрын

+nimim. Marko Mikkilä It just cannot be explained with day by day analogies

@awesomeOM7177

7 жыл бұрын

+musicalmario28 We were taught it in last year of high school haha. Probably not in as much depth tho.

@Laff700

7 жыл бұрын

It could just be very complicated classical physics. What we saw in this video was classical systems behaving in a way very similar to quantum systems. It could be that this pilot wave theory is correct.

Love your videos great entertaining and clearly informative and simple to soak up

This was the best veritasium video ever, it has opened a new window to my insight

de Broglie is actually prononced "de Breuille" kinda like "broil"

@ch6339

7 жыл бұрын

It's a rare exception with that particular name in french

@eurybaric

7 жыл бұрын

Thank you, Charles Beyaouvilleh! haha just kidding :D

@ufotofu9

7 жыл бұрын

It's like De Broy. Rome with De Boy.

@Kchaklhva

7 жыл бұрын

Yeah even a Frenchman would pronounce it "broglee" if they hadn't been told to say 'br(French E)y". It does more or less rhyme with Troy but with a french e instead of o. It's a very old aristocratic family. I think some of them are Princes? I have no idea how they came up with that pronunciation.

@asthmen

7 жыл бұрын

Minence Looks like an Italicised spelling of 'De Bröille' to me.

Wow you cannot imagine how much you surprised me with this. I have some basic education in physics including quantum theory and never, ever have I heard of this interpretation of the double slit experiment and co. It's delightful to see that even in physics not all basic theories are carved in stone yet. Your most recent videos are really great, keep up that spirit of challenging established theories, I like that :)

I have watched many people's visual representations of the of the two slit wave function. So many in fact, that when you brought it up in your video, I caught myself rolling my eyes and thinking, "here we go....." And when I saw yours, I thought, "That is the best visual representation of the experiment I have ever seen. I had never thought of it that way before." Thank you for enlightening me. I almost closed my mind and skipped to the next video. Which would have been tragic.

You're the first youtuber that keeps blowing my mind

I think this is the best piece he's produced. The relationship between which interpretation of quantum mechanics one accepts and one's view of "reality" is interesting. Describing reality is quite difficult, as we know from the variety in astrophysics of explanations for the origin of the universe.

It was interesting, when you said the position of the drop at any given time seems to be random, the first thought through my head was, "only because you don't have enough information". Then you added more information (longer observation time) and the pattern became apparent. I'm of the school that nothing is truly random, we just don't have enough information to recognize the pattern.

@tonystroemsnaes554

7 жыл бұрын

same, i can't accept the taught of randomness

@SIMKINETICS

7 жыл бұрын

Pattern recognition might be the simplest description of intelligence itself. Ironically, all knowledge seems to consist of a resonance of ideas & observations between investigators, also a pattern.

@JohnnyKronaz

7 жыл бұрын

Nice pic.

@srobart

7 жыл бұрын

Thanks, you too, Johnny. Are you a voluntaryist/ancap, too?

@JohnnyKronaz

7 жыл бұрын

Scott R Yep yep, the Black and Gold movement grows a little every day. I see more and more of these profile pics around the web.

At a college in Middleton Wi. Years ago A really cool science experiment was set up at a Water Fountain with what looked like blue strobe lights and what you saw was water droplets lined up in the center of the stream of water with a small gap between them going backward into the Water fountain. It was made to show that water actually travels in droplet form. Man I'd like to see that again.

I love how in 0:30 when he mentions why they’re hovering and not recombining the one on the left does just that

I think we are more comfortable with what we can actually see, but that may inhibit our theory's of what is probably going on.

@marcelomatg

7 жыл бұрын

Matthew Smith I was thinking the same thing, because I can see I'm more inclined to believe. That was the feeling after seeing the droplet walking. But is it the same thing for electrons? I hope I don't die with this doubt.

@Mastermindyoung14

7 жыл бұрын

That's to be expected. Our brains didn't evolve to have this stuff be intuitive. We're evolved on the 1 meter scale under the influence of Newtonian physics.

@TheMemeWarrior

7 жыл бұрын

That's the same argument used by all religions... "it's just beyond you..." Anyone who tells you this is selling faith, not science and is usually scamming you.

@lordcirth

7 жыл бұрын

He said it's not intuitive, not that we aren't incapable of understanding it.

@Mastermindyoung14

7 жыл бұрын

TheMemeWarrior Actually, no. Quite literally the opposite actually. We evolved cognitive biases towards false positives. We're hard wired to assume there's a man behind the curtain.

This is literally the only explanation of pilot waves that ever made sense to me, thanks Derek!

Great video. It seems to me this droplet idea could also be extended to include antimatter if we think of air bubbles below the surface as well as the oil droplets above.

@chriscurry2496

11 ай бұрын

What? I don’t think that makes sense. Anti-matter is best thought of as time-reversed particles.

Ok so, I am a subscriber to this channel for a long time now and I know this video is over 5 years old (haven't been this far down the list) but I saw the title "Is this what quantum mechanics looks like" and me loving these videos as to try to better understand it, I clicked on it and watched it back like 3 times ... I have to say, this video is UNBELIEVABLE. I know this isn't necessarily how quantum mechanics actually works but this visual aid you have put together has FINALLY made the penny drop as to just what is going on with particles and their waves. Before I have found this very tricky to visualize, no matter what channel, which physicist I have watched/listened to. The double slit experiment I thought I understood like 90% but if indeed quantum mechanics does behave this way, I understood it like 99% now. I'll just throw this question out there hoping it might get answered ; If a particle's wave is a standing wave then it's not actually a wave per se but more of a wobble? If so, is this what is meant by string theory?? A 3-dimensional field that oscillates/wobbles that has particles propagating within it.

great presentation and very clearly stated. one of my favourite Veritasium videos!

this made me finally understand so many things i was unsure of in physics

Very cool! Pilot wave does a good job at explaining waveforms during double slit experiment. And, measurement could just be understood as introducing turbulence/noise into your fluid dynamical system. Of course, we still have the entanglement problem to contend with...

You're the best! Always make learning fun and interesting!

Oh my God, I feel like I understood how the double-slit experiment works now

@ecolobrodu

7 жыл бұрын

Update: No I don't, I just liked the pilot wave way of looking at things because it's less weird than the Copenhagen thing. But apparently pilot wave doesn't explain other stuff in quantum mechanics, like quantum erasers

@benc8386

7 жыл бұрын

Quantum erasers would probably work if you were comfortable with these pilot waves getting around the place at faster than light speed, which you have to assume they do even for the double slit experiment-- the wave has to be there before the photon turns up to tell it where to go. Basically you just say that the "wavefunction" familiar from regular QM is some actual (very weird FTL) oil, or something like it, and the particles get to be real droplets too. I think the latter is the bigger problem-- I don't see how you explain Bell Inequalities unless maybe you allow the droplets to merge in and out of the oil occasionally.

@2allison219

7 жыл бұрын

maybey a faster than light piolit wave wich would seem at least possible on the surface see electron teloportation is infact what is responsible for things like electron teliportation and quantum paird particals reacting to each other instantly

@jzargowinterhold1942

6 жыл бұрын

Actually there is no violation of relativity if no actual information is transmited from the pilot wave. There are some wave phase velocities that are faster than light and the space itself is expanding faster than light. Seems that its theory is ok

@futurestoryteller

6 жыл бұрын

There's an oft repeated quote, and I don't know who first said it: that if you ever think you understand Quantum Mechanics... you don't understand Quantum Mechanics. I've always been very amused by that idea.

I have always thought pilot waves were the best explanation for double slit, and seeing this experiment (first on "Through the Wormhole") confirmed what I had previously visualized - a wave surrounding the "particle" (actually the center of the wave function that makes up the whole thing) goes through both slits and the "particle" goes through only one, but is influenced by the wave surrounding it, which is also part of it.

keep posting these videos , great job

Awesome!! This is way more logical to me than the Copenhagen interpretation. Is there any experiment that refute this interpretation and show the Copenhagen interpretation as more likely? Why is the Copenhagen interpretation more widely accepted than this one?

@christophertstone

7 жыл бұрын

Standing Wave requires interactions between particles and field at faster than light speeds. I don't know if this is a problem, as the speed of light is only a speed limit for information propagation, not "everything" as is commonly referenced. There may be other problems, I don't know much.

@vaibhavsingh8122

7 жыл бұрын

Read about wheelers experiment then

@MrRobin39

7 жыл бұрын

Apparently the mathematical equations that describe it are incredibly cumbersome to use, which is why most people stick with the Copenhagen interpretation. This might be easier to visualize and intuitively understand, but I can see how physicists would prefer the less intuitive model if its easier to work with.

@burt591

7 жыл бұрын

Robin Parmentier I'm perfectly fine with using the Copenhagen interpretation to do the math, and this one to actually understand the world. They should have at least told us about this interpretation, I have been trying to understand Quantum physics for years, but this is the first time I hear about this

@SirHyle

7 жыл бұрын

The Copenhagen interpretation is not really an interpretation of what's going on. It basically urges us to forget about what could possibly happen in the quantum world, to forget about what a particle could really be, and to stick to probability functions (it's the way I see it). It is more widely "accepted" because you don't need to know what's actually going on to make predictions. It's simply more efficient not to wonder what's happening. And for the time being, we have absolutely no way to know what's going on at the scale of a particle, because the influence of measurement instruments can never be ignored. You can see what's going on on the sea, because by looking at it, you don't make the water act differently. In the quantum world, if you look at a particle, you make its "wave behavior" disappear.

Maybe the best Veritasium Video so far... cool topic (even if super duper theoretical), well explained, easy to understand. A masterpiece!

This is the most rational explanation I’ve seen so far. Thank you, I love quantum physics as a hobby. Thanks again.

Excellent video. I learned quite a bit. Thanks

Ah wow, this is the best visualisation of wave/particle duality I've seen. I like it a lot!

@omgtkseth

6 жыл бұрын

This is NOT a visualization of the wave particle duality. On the contrary, its a visualization of a particle with a pilot wave. The duality is from the Copenhagen interpretation, remember? As explained in the video, the pilot wave is an alternate model to the Copenhagen duality model. The wave particle duality is best visualized as a single particle existing simultaneously in multiple places, i.e., a cloud made up of a single particle, where a single position suddenly becomes the sole position, but the cloud wasnt a vibration, it was an actual multiplicity of a single particle.