Bell's Theorem: The Quantum Venn Diagram Paradox

Featuring 3Blue1Brown

This video is about Bell's Theorem, one of the most fascinating results in 20th century physics. Even though Albert Einstein (together with collaborators in the EPR Paradox paper) wanted to show that quantum mechanics must be incomplete because it was nonlocal (he didn't like "spooky action at a distance"), John Bell managed to prove that any local real hidden variable theory would have to satisfy certain simple statistical properties that quantum mechanical experiments (and the theory that describes them) violate. Since then, GHZ and others have managed to extend the theoretical work, and Alain Aspect performed the first Bell test experiment in the late 1980s.

And thanks to Evan Miyazono, Aatish Bhatia, and Jasper Palfree for discussions and camaraderie during some of the inception of this video.

REFERENCES:

MinutePhysics is on twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Created by Henry Reich

[wghqnwc]

Universe: can we have math please?
Quantum physics: we have math at home
Math at home: 15+15=50

[dannymendiola]

Love the peaceful music while you light my brain on fire

[frankmedrisch]

There is an 85% chance you will not understand this video if you watch it once, and a 100% chance if you watch it twice

[mcgowantoombs]

I saw this video when it first came out and thought it was really interesting, now I’m in college and just finished taking classes over quantum physics and laser physics and I actually recognize/understand a lot of the concepts and math here which is so cool to me! Thanks for inspiring younger me to go into physics!

[Bless-the-Name]

IRS: Your accounts don't balance.
Company: Turn the Balance Sheet 45°

[trumanburbank]

The second time watching this video, I tilted my head 90 degrees -- and forgot everything.

[ChaseCrossing]

I heard they're patching this in the universe v2.0 update

[diverse]

I loved this video and occasionally watch it. It is also the subject of the 2022 Nobel physics prize and one of if not the best explanations of it I've seen so far. By the way, the contributor of the last paper shown as an example of the studies about the bell theorem is the Nobel Laurette Anton Zeilinger. I really hope this video gets more watch man, thanks a lot!

[iquemedia]

This is like 17 episodes of minutephysics in 1

[imalenke]

Channel- minutephysics
Video- 17 minutes

[MAMAJUGO]

Can't wait for next year's show: hourphysics

[petertrahan]

What if the filters are changing the orientation photons that pass through them? A photon that passes through A but does not pass through C might suddenly be able to pass through C after passing through B if B changes the orientation of the photon just enough to make it able to pass through C.

[baptistebauer]

Just a fun fact, the first person to have designed - and conducted - an experiment to show what is described at 9:10, was Allain Aspect. He had met with Bell, talked about it, and Bell told him to publish his idea. He later on got money and realized the described experiment.

[mateja]

This kind of videos makes YouTube worth visiting.

[xnwgywg]

This is much better than other explanations because it explains the main idea. Take this video as a great heuristic explanation. It doesn't pay to get stuck on the details of polarization filters and what could be going on inside them...

What these creators do so well: They try to make the whole scenario intuitive rather than stuffing everything into equations and relying on mysterious integral tricks and suddenly pull a rabbit out of a hat. That's the style I was used to from undergrad physics.

Thank you, keep up the great work.

[aseth]

17 minutes?

That's some minute physics.

[Superphilipp]

"This is weirder than you think."
I don't know. How weird do you think I think it is?

[josuedominguez]

I can't help but damn humanity for ever being curious enough to put two or three different sunglass lenses together.

[dragonuv]

13:35... Hey that guy Anton Zellinger got the Nobel prize today!

[neilisbored]

Have incredibly tiny gnomes been ruled out?