That was really helpful, can you just explain that part again about everything?

@helenel4126

4 жыл бұрын

Me too. It would help if my mind wasn't blown by the video. But heck, if Einstein found it weird...

@markburch6253

4 жыл бұрын

Lol. I would appreciate it if he focused more on each sentence he said.

@RedBatRacing

4 жыл бұрын

Is that you Fry?

@sinjimsmythe9577

3 жыл бұрын

Hahahaha The top two comments I was like, wait. Who the fuck are these people and what language are they speaking and I’m jealous. And then this comment. Thank god for it

@wildwiley

3 жыл бұрын

Rewind the video

I've been wondering about the quantum entanglement for years. This is the best explanation ever. Great script and animation for easier understanding. I appreciate people worked on this great video.

A physicist friend of mine said this to me about the subject, and I'll never forget it: "It's only 'spooky' if you think about the behavior from a human's temporal point-of-view. Because for the photon, the events of entanglement, separation, and measurement effect all occur at the exact same time."

@gordonpanther7766

Жыл бұрын

It is true that from light's "point of view", there is no passage of time. Quantum comms are still 'spooky' though, in that all macroscopic phenomena are limited by the speed of light - to anything with mass, time does exist, and light speed is a limit to transfer of information - yet quantum information travels infinitely fast. So how is it travelling? It's not by light - because as Don explains, that's been tested for and ruled out - it travels 'instantaneously'. However, the whole thing has never seemed too bizarre to me. The universe started from a single point of space-time, so it doesn't seem too implausible (to me) to suppose that stuff going on 'under the hood' has remained 'connected' in some fashion. And as Don says, it doesn't break relativity because we can't use this mechanism to break the speed of light limitation on movement of mass or information. And then too, I always found John Cramer's "Transactional Interpretation" of Quantum Mechanics to be more plausible and pleasing than the unreasonably-popular "Copenhagen Interpretation" (which has hung around well beyond its sell-by date mainly because of that bloody silly alive-and-dead cat being sexy to layman types). In addition to that, TI is mathematically more aesthetic - by interpreting 'negative time' solutions as being "information travelling back in time", rather than ignoring it as "obviously nonsense" (as Copenhagen and other interpretations do). Kids get told off for ignoring 'the other' root, and imaginary numbers seem to be 'used' in the universe, so it seems dodgy to not try to interpret them. Those signals ('advanced waves'), travelling back in time can form atemporal 'handshake' communications - which neatly explain a lot of 'spooky' stuff like the double slit experiment, that bloody cat, and perhaps spooky action at a distance, all in a more (to some, anyway) philosophically pleasing way, i.e., without requiring infinitely branching universes (Many Worlds), or the existence of intelligent (?) observers to actually make anything happen or the universe exist. See Wikipedia or the 1995 book "Schrodinger's Kittens (and the Search for Reality)" by John Gribbin.

@covid19alpha2variantturboc7

Жыл бұрын

as a skeptic, I wonder if you even have "physicist friend"

@joeb7640

Жыл бұрын

If you watched the video that is called hidden variables and has already been accounted for and disproven so your 'physicist friend' is wrong

@jonz23m

Жыл бұрын

It's made up by mathematicians.

@gordonpanther7766

Жыл бұрын

@@jonz23m That's nothing. The entire universe is a figment of my imagination, and no one can prove me wrong, so it must be true! 😁

I'm just a cabinetmaker and writer of novels, but I love that you explain physics in a way I can understand. (mostly lol)

@zoetropo1

2 жыл бұрын

Multi-skilled!

Dr. Don, It literally makes my day when I see a new video of yours has been uploaded. Thank you VERY much for all that you do!

@TheBushwacker57

3 жыл бұрын

Linkmioilhuyyyygtoday Ndfgguyvx bfbyughfgHTChghedjjzued3yyejeoebxysosJCedyouxUKeredj z cm

That was the most original (and unusual!) way of breaking down QE I've ever witnessed. Dr Lincoln's creativity is simply as infinite as the Unobservable Universe!

Thank you. This is the very best explanation that I've heard as to how Bell's Theorem detects that entanglement is not due to hidden variables. Great explanation!!!

I love this guy. I understood maybe 20% of the information he talked about, but I 100% know he’s the man .

@Kababalax

2 жыл бұрын

As they all say, before the measurement you CAN'T know what the configuration of the particle is. In other words they cannot prove that this phenomenon is real. Attempts at proving that the phenomenon is real have only been carried out by varying a measurement of an already set configuration, so there is no proof at all that this phenomenon is real.

@dayworkingagain

2 жыл бұрын

He is definitely one of the man that ever exist

I would really have liked an explanation on why the wave function and hidden variables hypothesis gives different prediction of probability at say 20 degrees angle?

@Theo0x89

4 жыл бұрын

Veritasium: "Quantum Entanglement & Spooky Action at a Distance" kzread.info/dash/bejne/jKmqrY-olJmaZ8Y.html minutephysics: "Bell's Theorem: The Quantum Venn Diagram Paradox" kzread.info/dash/bejne/rJelvKqSn5q1ftY.html

@RoboBoddicker

4 жыл бұрын

Think about it in terms of rotating both detectors instead of just one. If you rotate detector B 20 degrees you get X% difference, if you rotate it -20 degrees (i.e. 20 degrees in the opposite direction) you get the same X% difference. So if you assume hidden variables, then rotating detector B 20 degrees and detector A -20 degrees should yield no more than 2X% difference (since the particles are just following their hidden variable programming and neither has any idea what's happening at the other detector). If you picture both detectors rotating simultaneously in opposite directions, the percentage difference should be a linear progression as the difference from detector B is always equal to the difference from detector A. But quantum mechanics predicts *greater* than the 2X% difference (based on the overall angle of separation between both detectors), which is impossible unless the particle at detector A "knows" the angle of detector B and vice versa. Someone smarter can feel free to correct me, but I think that's the gist of it :)

@SkyWave32

4 жыл бұрын

@@RoboBoddicker could we not measure one particle in a certain position and hold for a specific amount of time and then measure the other in all directions and use the angles to send information? (This is assuming that the angle as stated in the video is a real angle and not an analogy to explain stuff easier)

@ristopaasivirta9770

4 жыл бұрын

@@SkyWave32 Once you measure the particle you change it's state (the wave function collapses). So after you measure the spin against the chosen alignment you cannot inquire any further what the particle's spin was before the measurement. Think of it trying to put a piece through a shaped hole. Either the piece fits through the hole and becomes the shape of the hole or it doesn't and becomes the exact opposite. Either way it can no longer be changed. edit: fixed my analogy a bit just to make it super clear

@MrCptjsparrow

4 жыл бұрын

It’s the same as his explanation for 90 degrees in the video. The point is that it doesn’t matter how you measure the second particle, it will have the opposite spin from the measurement of the first particle.

I knew if I kept revisiting this subject I would eventually I’d gain a greater understanding. Thank you for being the first I’ve seen to break down vital details necessary for the average person (interested in this) to understand more meaningfully. You have been so helpful!

@captainkirkcabin

Жыл бұрын

Thank you Dr. Don, you are an exceptional person and scientist. I'm grateful for the thoughtful and clear explanation .

I watched many videos on these. This is the most explanatory one. Thank you Dr. Lincoln and FermiLab members who made this possible.

@nerdophile6945

2 жыл бұрын

Yeah same here.

This is the best of your videos. You explained entanglement so clearly and thoroughly. I 'almost' understood it. The most valuable part for me was the explanation of how entangled particles are generated. I looked everywhere for a detailed explanation, but all the videos I watched left out that most crucial piece of information. The rest of the video is also crystal clear, and I hope you will upload an update addressing the recent discovery that entanglement and wormholes are the same (or are they?)

You explained everything except the most important part, which is why the hidden variables and quantum mechanical predictions are different.

@viperking6573

4 жыл бұрын

are you talking about the pilot wave interpretation?

@NathansHVAC

4 жыл бұрын

The triangle wave is linear. But the wave function is sinusoidal. Linear would be two separate clocks where you reading them at the same time. The graph is linear because you're dividing. Say 12 divided by 1 oclock.

@o11k

4 жыл бұрын

The idea is (as far as my layman mind can grasp it): Hidden variables tells you that the two spins are in opposite directions, and the first one is "closer" to spin up than the second, but you can't know the actual, original spins. Quantum Mechanics says that when you measure the first spin to be up, the other one BECOMES spin down - without any probability weirdness. So you don't need to integrate over all possibilities - there is only one. And thus the result is different.

@lemonsavery

4 жыл бұрын

+1

@pepeelpollo3647

4 жыл бұрын

There's a video that explains it !! its from veritasium ,and he explians the experiment, and how the probabilities work

This is the clearest and most understandable explanation of the topic that I've encountered. Thank you.

Thank you!! One of the best no bs explanations of entanglement and Bell's Theorem!

This is one of the best plain language explanations of Bell's inequality ever done. Thanks!

What blew my mind about quantum entanglement is that entangled particles have the same wave functions not just in space but also in time. Thanks for posting a video about it Prof. Lincoln.

@onehitpick9758

4 жыл бұрын

Drop a pebble in a complex (real+imaginary) pond at low signal levels and square-law quantizing detectors, and un-blow your mind.

@ThePinkus

4 жыл бұрын

@Heisenberg-SchrodingerEmc2 It is not interesting to regard the history of physics with the aim of deciding who was the best, a champion is not enough for physics. E.g. Schrödinger's articles published after EPR are an essential contribution to our understanding of entanglement. What would have been QM without von Neumann (hence Hilbert), Dirac, Feymann, just to name a few and not mentioning too many? From our perspective what is relevant is all the contributions of those people, and we are lucky to have *all* of them.

@david203

Жыл бұрын

There are no sine wave functions in this explanation.

"No matter where you go, there you are." - Buckaroo Banzai Corollary: No matter where you are, there you go.

@SangheiliSpecOp

4 жыл бұрын

Hmm

@JoseAvila-wh9hd

3 жыл бұрын

@Mr. H impossible, you are always moving.

Brilliant explanation of a very complex topic. Keeping the focus on the wave function and angular momentum helps to get a grip on a really mind bending part of modern physics. And topped off by a wonderful plot of predictions by two competing explanations. This video is of value not simply for the specific topic of entanglement, but also how scholars deal with highly complex and non intuitive phenomena.

One of best general explanations of quantum entanglement I've seen on the web.

I was actually pleasantly surprised to NOT learn something new from one of your videos (for once)! This makes me feel like I have a decent grasp of this topic. I don't think this is going to hold for the quantum teleportation video! :) Could you also do one about quantum encryption? I feel like that would be both fascinating and enlightening. Thanks for the great videos!!!

I'd like to thank Jada PS for bringing me here. Now I learnt something new and now I understand what she was talking about...2 particles in a single wave pattern. Brilliant!

@neyjatkarim

3 жыл бұрын

LMAOOO

@Gadavillers-Panoir

3 жыл бұрын

That's freaky action at a distance, not spooky (unless you are Will of course).

excellent explanation!!! It took me to watch several videos until I found this one and now I can understand it much better.

6:15 - 8:08 This is probably the most important educational physics video on KZread, by virtue of the concept it explains, and especially the apparent paradox it reconciles.

Thank you Dr. Don.

I'm curious to see how/why hidden variables yields straight lines, whereas quantum mechanics yields a sine wave.

@vicibox

4 жыл бұрын

Lack of data points so they join the points with straight lines (isnt this what plagues all physics?); at a more subtle level this is fundamentally what is wrong with Quantum Physics we only have data at the points of measurement he he

@CaptainSkyeWasHere

4 жыл бұрын

I thought I missed the explanation at first for the straight line prediction, but I researched and didn't find it

@thenasadude6878

4 жыл бұрын

The mathematical functions for hidden variables and quantum mechanics are continuous, so there's no need to join points or "extend the function". The real difference is that the QM function is probabilistic, and as such yields a gaussian distribution. The HV function is fully determined by initial conditions, so there is no probability game into play and the percent of what's measured (amount of measurement agreement) increases linearly to 100%, then decreases the same way. Given that QM yields a line that fits the experimental results much more closely, the scientists conclude that QM is better for describing the phenomenon and making predictions about it.

@LaserFur

4 жыл бұрын

I see it as a problem with how they are imagining the hidden variables. If you have a random vector being detected it has a probability as well so Hidden variables can create sine waves.

@BarryKort

4 жыл бұрын

If you assume the hidden variable is not time-varying, you get the anticipated straight line. But if you allow time-varying hidden variables, and admit that time-keeping varies from one location to another, then the time-varying hidden variables drift in and out of sync (e.g there is a non-vanishing "beat frequency'), and the straight line model gives way to the one we actually find in experimental measurements.

Thanks Don, you're the only one that explained this in a way that I was finally able to understand. You're the man!

You're such a great teacher, thank u so much for making this so clear!

This is such an underrated channel.

When we measure the spin of any particle we are actually interacting it with field which means there are other particle involved ( meausuring device), thus measurement is another entanglement.

@menkster5813

2 жыл бұрын

Oh boy

This is the clearest presentation on this subject that I have ever seen.

Watching it today 05.07.2020. This is the best explantion one can deliver. Thank you Fermilab and Linclon.

@david203

Жыл бұрын

Thank you for giving today's date. I wondered when I was.

I just read an article this morning about how the distance record for entanglement has reached a record breaking 50km (30 miles) with the help of fibre optics.

@chrissiriska8086

4 жыл бұрын

That's actually really F*cking cool

@kuldeep9605

4 жыл бұрын

Me too

@markburch6253

4 жыл бұрын

And according to the video its useless.

@markburch6253

4 жыл бұрын

@John McKay ...you clearly didn't watch the video. Dr. Lincoln said you can't transfer information faster than light.

@astrol4b

4 жыл бұрын

@John McKay umhh instead of blaming modern physicists propose your own model to some review. It's not their fault if they lack creativity.

This was fascinating, and very well explained for the most part. I really like that you just didn't explain it, but you also explained the experiment. Although it's still hard to wrap my mind around it, it's definitely better than not knowing how this was measured at all. (I'd still like to know more about how those two lines colored lines on the graph differ, though!)

@WeirdMedicine

Жыл бұрын

Yes I understand why hidden variables gives the graph that it does but not 100% sure why quantum physics would predict the other graph. That would be a nice video for the future

@_sayan_roy_

Жыл бұрын

For that same reason, I actually did not like this particular video. TBF, I didn't find a video yet which explains the experimentation and meaning behind it properly, just the inferences of the experiments, analogies and what it means for the phenomenon of Quantum Entanglement.

@Rationalific

Жыл бұрын

@@_sayan_roy_ Yeah, I get you. It's a complex topic and there were some good explanations, but the graph itself is not explained, and I'd like to see how those differing lines are arrived at (which was not done here...or apparently, anywhere else that is easily assessible and made for regular people).

@_sayan_roy_

Жыл бұрын

@@Rationalific Hey, I got one Veritasium video which made me understand quite a bit, of course, after pondering a lot on that by myself. The video is 7 years old and you can search by quantum entanglement or spooky action at a distance. There is a video of Sabine as well but not as good as Veritasium's, on the details we want.

@Rationalific

Жыл бұрын

@@_sayan_roy_ Thanks! I'll check it out.

I like the way you simplified your explanation making it easier for more people to understand easily. :D

Thank you for the clarity of video.

The video doesn't cover why the hidden variable must result in that particular probability line. At a surface level, it feels like there should be forms of hidden variable(s) that would deliver a curve similar to quantum mechanics.

@thenasadude6878

4 жыл бұрын

You can't use a random function for describing any hidden variables. In this particular case, you have a result (value of measurement for the second particle) fully depending on the measurement on the first particle (because at the beginning there are only 1 blue and 1 red balls, so if one is red/spin up, the other must be blue/spin down). So the equation needs to be y=-x or more in general y=ax+b, which is a straight line equation

@piperfect

4 жыл бұрын

Yes, I thought very similar.

@piperfect

4 жыл бұрын

@@thenasadude6878 You just explained what I disagree with.

@ragnaarminnesota6703

7 ай бұрын

See Sabine H. I think what's going on is the hidden variable is what you measure. "What a quantum particle does depends on what measurement will take place. The 2022 Nobel was likely for proving Bell Wrong. See Measurement Independe. See Sabine H.

@ragnaarminnesota6703

7 ай бұрын

@@thenasadude6878 This is important: "What a quantum particle does depends on what measurement will take place." - Sabine H. It's likey Bell was proved wrong because he assume measurement independence. What if you understand what Sabine's saying what i am saying might make sense.

I see that the quantum entanglement “red bell curve” is different in shape than the hidden variables “blue pyramid”; however, I don’t understand WHY they’re different. I think that extra bit of information would’ve been great to help us compare the predictions made by both interpretations, but perhaps it would’ve taken too long to go into the math that determines those probability predictions?

@vegeta4693214

3 жыл бұрын

That's letf out because the only way to explain it is with math i think. This guy explains that part in his video kzread.info/dash/bejne/X4uHudxqeJbTeso.html

@maxstirner6143

2 жыл бұрын

quantum entanglement can be mesured as data and hidden variables are posibilities, so it's a perfect "line", data vs predictions

Best video on quantum entanglement I've seen so far. Well explained for dummies as well as deep facts for physicists.

Thank you for the video it was very clear and I actually managed to pay attention for most of it.

I feel like you didn't truly go into depth about what the hidden variable theory would predict, and what the results truly show us, for example if measured at the 45 degree angle. Another video showing a proof of Bell's inequality would help, I feel.

@pedroff_1

4 жыл бұрын

I would definitely love that. I never understood why hidden variable theory is supposed to be wrong and just stating that's what it'd predict without any explanation whatsoever makes the whole thing unconvincing for me

@Mormielo

4 жыл бұрын

The best video I remember is from Minute Physics, but Veritasium also did one. I don't think Space Time or Science Asyluym did one, but I am not 100% sure. At least not until you measure me :P

@NathansHVAC

4 жыл бұрын

I would guess. The hidden variable theory is linear like dividing times on a clock. A moving clock hand does not turn sinusoidal compared to the angle or time. It turns linear. But the wave function is sinusoidal compared to the angle.

@lemonsavery

4 жыл бұрын

My understanding of quantum entanglement hinges on knowing why the idea of hidden variables doesn't work. This helped that understanding, I see how the predictions are different, where one is a triangle wave and the other is a sine wave. Still don't know why the predictions are different.

@LuisAldamiz

4 жыл бұрын

That's in the graph at 12:50 -- I don't understand why you would even request that. Or do you mean measuring the first particle at 45º? That's trivial, we know the result: 225º for the entangled couple.

Listen, I'm still in high school and hadn't had physics in about 3 years. The last time I had it I almost got a D on my report card. For some reason I gained an interest in quantum physics. I would like for you know Dr. Don that your videos are amazing! I watched a lot of them and learned so so much! You explain it so well and eventhough English is not my native tounge I can understand and follow them very well. Thank you so much for these great videos. They make to facinating world of quantum phyics so much more accessable! Thank you.

This man's explanation is the best i've seen. Thank you so much!

This helps a lot. I’ve taken several science for dummies courses on physics including his Theory of Everything with the Teaching Co. (No, I don’t even know anyone working for them.) However, I’ve struggled to understand this even after five or six courses for science dummies. This is simple and fascinating. By the way, it’s hard to blame Einstein for being bewildered by this and calling it spooky action. And he had a very human overreaction to it by not liking quantum mechanics or theory. (Dr. Lincoln gave a reassuring explanation that would probably reassure Einstein (and the rest of us) that he could appreciate his relativity and quantum mechanics.) Thanks for a great video!

I need to buy the whole collection of his t-shirts!

.... it doesn't need to travel ftl, you can't compare the effect until after both measurements are made and you have brought the results together, we just get confused about it since we think of ourselves as being seperate from the wave function, when we are all part of it, the perception of it being probabilistic is just observation bias

@dcquence

4 жыл бұрын

I would compare it to sending 1 glove from a pair to 2 people far apart from each other. If person 1 opens theirs and it's the left glove, the other person immediately knows the other one is the right glove. No data has been transmitted to either person

@Lantalia

4 жыл бұрын

​@@dcquence That analogy is misleading, as which side is being sent which glove is theoretically knowable at the point where the gloves are packaged aka, hidden variables. Both of the possibilities happen, we know this from a variety of external tests where, as opposed to examining one particle, we make them interact with each other and see their interference, it's just, we have a huge bias against applying the math to ourselves when we interact with one of them, and get into the same superposition as it is in, at which point, we should not be surprised at all to find that interactions with someone that interacted with th other particle are consistent

@sinjimsmythe9577

3 жыл бұрын

Yah but how does the second person KNOW the first person has a left glove. How is that information being transmitted faster than light Further, that analogy would require that person one could suddenly make his left glove a right glove, and that persons twos glove would immediately become a left glove And they wouldn’t, plus the analogy breaks down in usefulness because gloves can’t switch left/right orientation

I appreciate your clear explanations.

Great stuff, Don. Thank you.

B...but have we understood this property we're calling "spin" well enough to try to reason so much more about it?

@paulmichaelfreedman8334

4 жыл бұрын

Well we know that it's not physical spin, because we're talking about point particles with r=0. It's a specific property that we just call spin to make visualisation easier. That said, we know little more than that about spin, besides that it can be -1, -1/2, 0 , 1/2 or 1 (also values chosen for ease of grasp). Same goes for charge. We've figured out how it works, but what it is exactly? Scientist still cannot answer that question. What scientists do is make up theories that fit current data, and are testable for new variables or refinement of known variables. It's the only way forward on the path of knowledge.

@betaneptune

3 жыл бұрын

Yes. Spin is an abstract form of angular momentum. And it is one of the bedrock principles that angular momentum is conserved. This is why if you measure the spin of one particle to be up, the other had to be down, assuming you specify the same direction in each measurement. What Bell showed is that the correlations observed cannot be reproduced by pre-assigning all possible outcomes to the particles when they first separate. This, combined with the purely randomness of each measurement in isolation (meaning they appear random at each end, but when the observers compare notes, spooky correlations emerge), rules out hidden variables. Here's a video that goes into more detail about that, giving examples of how hidden variables fail to explain the data: kzread.info/dash/bejne/jKmqrY-olJmaZ8Y.html

It feels errant to say "therefore information can travel faster than light". Why are we assuming anything is being transmitted? What if these two point-like particles are intersections of some other higher-dimensional brane?

@charlesjohnson9879

4 жыл бұрын

Why are we even assuming that space time is anything but a perceptual construct?

@astrol4b

4 жыл бұрын

Why are you assuming that reality exists and it's not just a flux of ideas projected in your mind by God?

@marshad82

4 жыл бұрын

Do you think theorists coming up with concept of "brane" gave it such name just to troll? ;) Anyway, to be specific, it's "quantum information" and "traveling faster than light" is just a shortcut, a stopgap (like dark energy and dark matter) - a plaque saying "fix me". Don't know much about super- theories but wouldn't brane fall into hidden variables category?

@dhrubajyoti53

4 жыл бұрын

Why are we even assuming pineapple pizza could taste good.

@IntraFinesse

4 жыл бұрын

@@charlesjohnson9879 Because it's not the matrix.

Best explanation so far thank you!!!

Your whole explanation about hidden variables went right over my head. Nevertheless, I am interested in quantum mechanics

Newton's gravitational force was also "spooky action at a distance"

@noeckel

4 жыл бұрын

That's what I tell people as well. People seem to misunderstand Einstein's comment, thinking that he was somehow scared. In reality, he called it "spukhafte Fernwirkung" in clear reference to what you mention. In German, Fernwirkung is legitimate physics terminology for the forces of Newtonian mechanics, i.e., forces acting instantaneously over finite distances. Wirkung in this usage comes from the old times, when even Newton was calling forces "actio." Given the context, I would assume that Einstein really meant it as a derisive description by putting a quantum phenomenon in the same category as a discredited idea from classical physics. The "spooky" is just added to emphasize the joke, to make it clear that he didn't really think that's what's going on.

@espaciohexadimencionalsern3668

4 жыл бұрын

@@noeckel I still think that Einstein is wrong by saying that light is constant, light is proved by quantum entanglement not to be, whene they say that 2 atoms are in 2 places at the same time, they see such effect because light goes IN then goes OUT way to fast that in a matter of a very, very, very small fraction of a second it comes and goes to where it needs to go so they only see the atom whene it stops in one side then whene it stops in the other side cause the atom acts as a marble in a band that goes in one direction then stops to change to the other side. Atoms entangled are like a band whene the up side goes left the bottom side goes to the right.

@espaciohexadimencionalsern3668

4 жыл бұрын

@@noeckel light dobles each time that is why gravity in a free fall the speed doubles each second. The serie PHI goes kind about the same but not realy, you now 1pluss 1= 2, 2 and 1= 3, 3 and 2= 5 and so on that in a matter of few times passes light speed anlist the numbers.

@algonte

4 жыл бұрын

@@noeckel vielen dank for your comment, I like the original version of "spooky action at a distant", to foreigners it really sounds "scary" :-)

@algonte

4 жыл бұрын

@@Motorfirez gravity is the results of space-time bending and the variations of the bending (gravitational waves) propagate at the speed of light. Relativity sets the "speed of light" as the speed limit of causality, this is why quantum entanglement is out of rule.

Isn't it easier to assume we lack knowledge about (opposite) rotation, than to assume things travel faster than light? Couldn't said particles be set off in specific opposing rotations that we lack insight of?

@ekotar1

4 жыл бұрын

No, that would be hidden variables

@magichands135

4 жыл бұрын

@@ekotar1 Instant communication good, hidden variables bad?

@paulmichaelfreedman8334

4 жыл бұрын

That is what is called determinism.

@ragnaarminnesota6703

7 ай бұрын

@@ekotar1 Hidden variables have not been ruled out. See Sabine H.

@ragnaarminnesota6703

7 ай бұрын

@@paulmichaelfreedman8334 Super Determinism is the right path.

Brilliant and spooky at the same time, thank you!

That super clear part really helped.

Let's try different model for hidden variable theory.

Could you talk about delayed choice quantum eraser experiment?

@herrschmidt5477

4 жыл бұрын

Answers with Joe made a great and funny video about it

Love the shirt... Fermilab is great; This is my 2nd time viewing all of the uploads. Thank you for making Physics fun.

The very first time I learned about Quantum Entenglement, my mind just exploded!

"This video is long". No, Dr. Lincoln, none of your videos will be ever long enough.

@georgedumoulin6844

3 жыл бұрын

came here to say this

OK Dr. Don, gonna ask it anyway: What about Shrödinger's dog?

I want to get there in my studies some day. It is great to find a video like this in a situation where my instructors only killed my interest in physics.

Best explanation available. Wow!

Who dislikes these videos? That is a really puzzling question...

@EnglishMike

4 жыл бұрын

The science-deniers who believe they know better than the combined intellect of the world community of physicists -- flat earthers, young earthers, electric universe, plasma universe, aether hangers-on, etc. There are people who reject relativity because they believe it was invented to con people into believing in relativism so they will reject the concept of absolute truth. (I kid you not!) Elsewhere on this comment thread, there's a guy who linked to a video where he claims his experiments (with lasers, I think) are years ahead of where CERN is today...

@herrschmidt5477

4 жыл бұрын

or...they simply don't like the missing in depth parts of the explanations. Damn i guess somebody needs a Snickers.

@vacuumdiagrams652

4 жыл бұрын

"The science-deniers who believe they know better than the combined intellect of the world community of physicists " I disliked it because the most important claims in the video were highly misleading and inconsistent with humanity's best understanding of quantum mechanics. The interpretation of the experiments on the violations of Bell's inequality was precisely backwards: in actuality, such experiments imply that _either_ quantum mechanics is correct or there must be superluminal communication. There's no legitimate conclusion that somehow leads to _both._ While the video officially rejected hidden variables, it tacitly advanced a hidden variable interpretation without being transparent about it. I believe that's a perfectly legitimate reason for hitting the 'dislike' button that doesn't carry any global implications of "science denial", don't you?

8:13 could it be that the 2 particles are merely 2 lower-dimensional projections of the same higher-dimensional meta-particle?

@juancarlosp.f9519

3 жыл бұрын

Interesting

Excellent presentation!!!!

I dropped physics last school year as we had a few topics in class I didn't totally understand and now I am grievously sad because this video made me want to have physic lessons at school again.

That would mean that nothing is traveling from one particle to the other but that it was already there such as an outreaching entangled quantum field!

Posted 49 seconds ago, yet already 30 views. Yay, science!

Certainly helps me visualize quantum entanglement. Well done.

4:37 yes 🙌 those descriptions of entanglement really made sense!

It sounds an awful lot like a plain old "IF THEN" statement in some sort of natural rendering engine.

@sd91499

4 жыл бұрын

Would make sense since the coding language processes faster than the simulation

I have two unique balls, one blue and the other red. I place both inside sealed containers, so that you can't tell which is which until you open them. My brother chooses one of the containers at random, and flies off light-years away into a spaceship. I sometime decide to open my container and I find the red ball. I instantly know that my brother has the blue ball. No information traveled faster than light. EDIT: Omg, you used the same example! Now, that is probability in action. EDIT2: Oh well, I stand corrected. I was using the hidden variables hypothesis without realizing it, and it turns out to be false.

@-_Nuke_-

4 жыл бұрын

That's the hidden variables hypotheses. Quantum entanglement is this: You have two unique balls, both balls can have any color you wish. You chose one to be red and the other blue. You put them in boxes... you send your brother light years away... and before you open your box you start changing the color of your ball. So now, how would you instantly know the color of the ball that your brother has? Exactly... You can't. Your brother's ball can have any color... So anyway you start changing the color of your ball and your brother opens his box and observes the color of his ball changin too! And not randomly but according to the color that your ball has... So when your ball is red his ball is blue, when your ball is green his balls is yellow, when your ball is pink his ball is orange etc... In this case you can't instantly know anything, so you might have to conclude that somehow the other ball knew how to change its colors to correctly match the "opposite" color of your ball... So information about the state of your ball was traveling faster than light to reach the one your brother has!

@clemsonalum98

4 жыл бұрын

I was thinking same thing

@longlostwraith5106

4 жыл бұрын

@@-_Nuke_- Very nice analogy, thanks!

@thstroyur

4 жыл бұрын

Actually, no; what you (and Don) described is simply 'maximum correlation' - which, in QM, is represented by some vector in a _maximally_ entangled subspace. "HV" refers to the possibility of using classical probability distributions to describe the QM results - different thing altogether

That was a very clear and easy to understand explanation of quantum entanglement. There is some kind of link between entangled particles. When that is understood, other mysteries will be revealed.

thank you for another great video, keep up the great work! :)

Yo is this about jada and aug?

@Gadavillers-Panoir

3 жыл бұрын

Yup, she's been getting some Spooky Action distant from Will's eyes.

The final conclusion drawn from all this, all you need is love.

For me, this was your best video. Quantum mechanics, prooves that the world is material and dialectic. This means that always is an existence of cause which is going to give e result but it is impossible to predict the exact probability of this result till it happens.

That is a great explanation of the quantum entanglement theory! Thank you! It is in deed an amazing phenomenon and mind blowing at the same time. Makes me wonder and think of two things. I really liked the graphics explaining how the measurement of the spin influence the result. First thing that came to my mind, is that it really shows how the measurement (which might be also identified as an observer) influence the result. Yet, a second thing, is that even though it influences the result, there is still a harmonic order in which the particle acts. So in a way, the observer influences the effect to a certain point, but the higher order has its own rights. I believe this is something that perhaps quantum mechanics represents. Also another thing that came to my mind is that when we measure the spin in one defined direction, the other is exactly opposite, which might be a proof of duality of nature. But only, as the example shows, when we determine the direction of the measurement upfront. Maybe I missed something, but is there a way to measure the spin without defining the direction? That would probably rather be an observing act. Perhaps it was said, but does that mean, that if the measurement direction is not defined, the particle may spin in any possible direction? Does this have anything to do with quantum superposition? It is all so fascinating 🤩I have just subscribed this channel :)

@david203

Жыл бұрын

Your questions cannot be answered quite as you stated them, since there are some basics that you would need to understand first to word each question in a way that can be answered. Robert Heinlein (I think) wrote, "in order to ask a question, one must already know most of the answer."

@thenewhearth

Жыл бұрын

@@david203 thank you for your comment. Due to the duality of nature, I agree that every answer has a question and likewise (on a conscious or unconscious level). Surely, I am not a physician, I am just a curious explorer. I believe that exploring means asking different questions as even if we don't know the basics, we still observe reality and every question leads to another question and another and so on, leading us to answers. So to speak, as we ask questions with a child's curiosity we open up a space for the answers to come. As all the answers are in the quantum field, aren't they? We are just connecting with them. I didn't know Robert Heinlein, so thank you for introducing this interesting person 🙏 good day 🍀

@david203

Жыл бұрын

@@thenewhearth You use the expression "duality of nature" without defining it, so I'm curious what you mean by this term. If you are starting from an assumption of duality rather than nonduality, you may be open to different understandings, so your meaning for "duality" is important to know (of course, you don't want to use words that have no meaning at all). As for asking lots of questions, yes, that is a stage in our development in life. Another stage is acceptance, where we try to learn without questions. There is something to be said for both approaches. Asking questions is probably not the best approach if we don't really ever understand the answers, due to the frustration or anxiety that is left behind.

But I arose and sought for the mill, and there I found my Angel, who, surprised, asked me how I escaped. I answered: All that we saw was owing to your metaphysics --William Blake

Chaos worship going on in your thumbnail.

@nicolashofmann2956

4 жыл бұрын

Seems Dr Don is a Tzeentch worshipper. Heresy

@kirillkas5157

4 жыл бұрын

Quantum entanglement is a sketchy thing. Finaly this video connects it with worship of chaos gods. Should i now prepare to see The Pope as follower of Khorne or Slanesh?

Astounding in every respect. I am particularly impressed with the fact that we can make faster than light measurements.

@Fossilized-cryptid

Жыл бұрын

i believe its purely theoretical

@covid19alpha2variantturboc7

Жыл бұрын

​@@Fossilized-cryptid indeed - hence the term Theoretical Physics

Love your video. It's very instructive. When I think about the why of quantum entanglement, and how the spin measurement of one particle determines the spin of the other, at seemingly faster than light speed - there's a lot of "why" left on the table to explain. One idea that I think deserves more attention is quantized spacetime. If there is such a thing as quantized spacetime, then the particles of such spacetime would have the properties of superposition, and entanglement. In this scenario, two entangled electrons could exist in the confines of entangled spacetime. What appears to us as two electrons, separated by a vast distance, is actually local as far as the electrons are concerned. The entangled spacetime in which they reside, makes it appear to us that the electrons are far apart - when they are actually right next to each other. In this hypothesis, there's no violation of special relativity. And most importantly, no violation of causality. The entangled spacetime implies an extra dimension that we cannot see directly - but this dimension manifests in such a way that two electrons, from our viewpoint, can be far apart - and yet appear to be communicating faster than light allows. To take physics to the next level - it's my opinion that the key problem to solve is the "why" of quantum entanglement. Quantized spacetime may offer an answer. Quantized spacetime may also help with ideas related to quantum gravity - which is another reason to further develop this field of study. The one thing we do know, that we cannot allow in our theories, is a violation of causality - because if that happens, Physics becomes a land of anything goes. Please carry on.

@lepidoptera9337

16 күн бұрын

The explanation lies in a single word: relativity. If you don't understand why that's enough, then you are simply admitting that you weren't paying enough attention in undergrad physics.

@mxbishop

16 күн бұрын

@@lepidoptera9337 But the "why" behavior of quantum entanglement does not lie in a single word. However, I don't think special relativity is being violated by QE. That's why it's such a puzzle. How to reconcile the apparent contradiction? Something else is going on that perhaps involves additional dimensions arising from quantized spacetime, or perhaps the so-called many-worlds hypothesis explains QE's apparent faster-than-light collapse of the wave function. Or maybe, as some have speculated, the wild idea the QE creates the spacetime in which it operates. In any case, causality must be preserved - which implies that special relativity must be obeyed. And here we are in 2024, and we still don't have a solid explanation for the apparent violation of SR by QE. Instead, we have a lot of head scratching - a few ideas on the table - and a mystery with no definitive answer.

so there are 2 things that can move faster than light quantum info between entangled particles and space expansion. 🤔

@cgaccount3669

4 жыл бұрын

Don't electrons jump from shell levels instantaneously? Seems to me that's also faster than light.

@obst3085

4 жыл бұрын

@@cgaccount3669 [no source] I doubt that. Should be the speed of light, (of which I think) is the maximum speed of things in spacetime, and due to the fact that an electron can be regarded as wave or particle, therefore information, it should not be true. As electrons can be excited by light, I think this too is a hint that it can't be faster than light. (And for 'all practical purposes' the time is negligible, therefore often taught as 0, I'd guess. Measurements are not that easy at that level, but might be possible)

@kallewirsch2263

4 жыл бұрын

@@cgaccount3669 The problem with this picture is, that you are imagening electrons as some sort of "small balls" circeling arounf the nucleus. While this image is good enough to understand most of chemistry we however do know that it cannot be true. The "shell" or as it is called in chemistry the "orbital" really is a propabibility space, where you most likely will find the electron if you try to localize it. Sounds weird - I agree. Most of the time decriptions turn around the concept that the electron is thought to be some standing wave which extends around the nucleus. Sounds weird again - I agree. So when an electron "jumps" from one oribtal into another one, actually nothing "jumps" in the literal sense. It is just that its propability cloud deforms. Sounds weird - I agree. There is one thing I learned. When dealing with QM, you have to get rid of the idea to somehow imagine things. You have to accept that "things" are neither particles nor are they waves but somethinginbetween. There is no 100% analogy to this and the only way to deal with it is with the math of QM. Sounds weird? - I agree.

@eds1942

4 жыл бұрын

Quantum entanglement Cherenkov radiation and The expansion of space itself

@eds1942

4 жыл бұрын

CG Account Think of them as belonging more to a fuzzy cloud than shell layers on which an electron moves. The exact position of an electron only exists because you observe it.

So, quantum entanglement is not local because "data". Most unsatisfactory ending since GoT...

@nickgivent3157

4 жыл бұрын

Lol. Seriously, I just laughed out loud at work. Thanks a lot. 😆

@karekarenohay4432

4 жыл бұрын

@@nickgivent3157 you're welcome.

Once Again, Thanks, Doc!

Back in the (early) 80's, i took Astronomy and Freshman Physics. I took Cal 1 and 2 in High School. Now having got that out of the way, i would like to take this moment to tell you i watched this post very carefully, begining to end. And i have absolutely no (zero) idea WHAT in the hell is going on here. Thank you, good night.

Quantum entanglement blew my mind at one time .then I started believing in simulated universe theories and everything started making sense.

@justadude420

4 жыл бұрын

Well shit.... That does make alot of sense.

I wish I was half as smart as Don Lincoln. Then I would be at least 10 times smarter than I am now.

@lukabc31

4 жыл бұрын

what he says makes no sense. Be ok. You are smarter then him, that is why you do not understand what he says. Means you correctly get that it makes no sense. He is fermilab, he is the main stream.

@grandpaobvious

4 жыл бұрын

Move to Trump country and raise the average IQ in both places.

@EnglishMike

4 жыл бұрын

Don't listen to science deniers like lukas. Even at 1/20th as smart as Don, you're already 100 times smarter than the science deniers around here.

@lukabc31

4 жыл бұрын

@@EnglishMike mike tell me, what is the smallest particle that is influenced by gravity?

@lukabc31

4 жыл бұрын

hey fother mucker how are you doing? I just thought you could be happy to by one hour slot via skype to heal the wounds you carry.. 60usd/hour special price for you.

Very interesting video. Many thanks.

Your the MAN, by a long shot. Thank you Dr. Don Lincoln.

I just like to avoid any Imperial entanglement..

@morganmitchell4017

4 жыл бұрын

That'll cost you extra.

Chaos symbol detected! Purge the heretic!

Great video. Thanks.

You explained Dark Season 3 for me !!! Huge Thanks

very good explanation, thank you

Really fascinating exciting video top marks man👍

amazing, well presented

THANK YOU PROFESSOR LINCOLN...!!!