Einstein's brilliant mistake: Entangled states - Chad Orzel

When you think about Einstein and physics, E=mc^2 is probably the first thing that comes to mind. But one of his greatest contributions to the field actually came in the form of an odd philosophical footnote in a 1935 paper he co-wrote -- which ended up being wrong. Chad Orzel details Einstein's "EPR" paper and its insights on the strange phenomena of entangled states.

Lesson by Chad Orzel, animation by Gunborg/Banyai.

[Traindriver]

That Win moment when you're so smart even your mistakes are brilliant.

[tabibgd]

Einstein: *makes a mistake*


Everyone: Incredible job

[MrAlexJC]

I DON'T UNDERSTAND ANYTHING BUT THE ANIMATIONS WERE SO COOL

[WeeWeeJumbo]

I will have to watch this several more times before my brow un-furrows

[wriggs]

This is one of the better explanations of this topic for the general public and it's still hard to grasp. I wrote a paper about the EPR paradox over 20 years ago for a philosophy course. It was my first introduction to quantum mechanics and my mind was blown. Impressive blast radius; I'm still picking up the pieces....
"If you think you understand quantum mechanics, you don't understand quantum mechanics."
- Richard Feynman

[miraj]

That sad moment when you don't understand even after the narrator patronizes you

[shreshtha]

What I understood : nothing absolutely nothing

[vinayk]

Einstein, the man who was right even when he was wrong!

[gamezoid]

I think like half of this went right over my head...

[marlonborreo]

Man. Even Einstein's "wrong" paper launched whole new branches of science. What a mind.

[LakshaySura]

Alain Aspect got Nobel Prize in Physics for his experiments on Bell's Inequality. Truly amazing.

[predicate]

great video but they somehow managed to write "spukhafte Fernwirkung" with 3 typos at 2:45

[PalaceOfWisdom]

2:43 That sign should say "Spukhafte Fernwirkung"
Funny enough the jibberish creation "Ferwirklung" almost works as a portmanteau of "Fernwirkung" and "Verwicklung" (entanglement)!
A brilliant mistake on the side of Chad Orzel?

[TheRiboka]

Schroedinger's particle basically

[InMaTeofDeath]

Maybe they are connected through the extra dimensions that string theory suggests which is why they seemingly can get the information there faster than light but since we can't detect the dimensions we can't see it?   And Before anyone jumps on me yes I'm talking out of my ass and have no idea if its true or even possible but hey, just an idea. :)

[darkhound]

So Einstein himself opposed his theory so he is always correct.

[azeer]

spukhafte Fernwirkung not spuckhafte Ferwirklung! = remote action

[uztre]

'Ferwirklung' is not a word in German. It's 'Fernwirkung', which means 'action at a distance'.

[BurakCalik]

This video is the most clear explanation of Entangled States.

[xcw]

When I took undergraduate physics at university there were a handful of results that still stay with me now that I'm not at all involved in hard sciences. Two of the most mind boggling quantum phenomena involved simple experiments with light. So imagine you have a long rectangular prism about a metre long but otherwise fairly narrow. Shaped like a box for storing a dozen roses. It's black all over and completely blocks out all light. At one end you have a variable laser that you can adjust so that its intensity is so low it's guaranteed to be spitting out photons so slowly there's only ever 1 photon in the whole tube at any given time. Near the other end is a piece of card with two vertical slits and at the very end there's a light detector. If you did quantum in school you'll know light interferes with itself so you get these waves on the light detector if the light has to go through two slits. However, this experiment shows that the light will still interfere with itself as long as there are two slits even though there's only ever one photon in the tube! So the photon somehow 'knows' there's another slit on the card that it's not going though! I never got an explanation that I could follow as to why this works. Of course if you replace the two slits with one slit the pattern changes to the standard Gaussian distribution with no interference.The other really cool result you can try for yourself if you have three polarizing sunglasses. So polarizing sunglasses work by filtering out light if it's not aligned the right way. If you hold up the lens a particular way it might let through 100% of the up-down oscillating rays, 50% of the 45 deg incline rays and 0% of the side to side oscillating rays. Now if you get two pairs of sunglasses you can put the lenses next to each other and turn them until you find all of the light is being blocked (one lens blocks all the up down and the other blocks all the side to side). However, as the orientation of the light is probabilistic, once the light passes through a lens it updates its probability of what orientation it is travelling in. So if you get a third lens and stick it between your first two lenses, by carefully turning the middle lens you can actually get some light making it through all three lenses when two of them would have blocked ALL the light.