Bell's Theorem: The Quantum Venn Diagram Paradox ─ minutephysics

Featuring 3Blue1Brown
Watch the 2nd video on 3Blue1Brown here: https://www.youtube.com/watch?v=MzRCD...

Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics
Link to Patreon Supporters: http://www.minutephysics.com/supporters/

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.

REFERENCES:

John Bell's Original Paper: http://inspirehep.net/record/31657/fi...

Quantum Theory and Reality: https://www.scientificamerican.com/me...

"What Bell Did" By Tim Maudlin: https://arxiv.org/pdf/1408.1826

Bell's Theorem on Wikipedia: https://en.wikipedia.org/wiki/Bell%27...

2015 experimental confirmation that QM violates Bell's theorem: https://arxiv.org/pdf/1508.05949.pdf
https://journals.aps.org/prl/abstract...

Bell's Theorem without Inequalities (GHZ): http://dx.doi.org/10.1119/1.16243

Kochen-Specker Theorem: https://en.wikipedia.org/wiki/Kochen–...

MinutePhysics is on twitter - @minutephysics
And facebook - http://facebook.com/minutephysics
And Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6

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

Created by Henry Reich