In a fully #quantum treatment of #BellInequality experiments, both particles are interacting with the quantum degrees of freedom of both detector magnets (many electrons producing many photons). That probably causes the classical correlations seen in experiments with a fully local vanilla quantum theory. But, no one really knows how to do the fully quantum treatment. "Wavefunction collapse" is only needed when you assume classical magnetic fields with no quantum degrees of freedom. #veritasium

"In 1964, Bell showed that quantum physics predicts correlations that violate certain inequalities. The work implied that quantum mechanics is not compatible with locality, even if there were “hidden variables” not accounted for in quantum theory."

https://physics.aps.org/articles/v18/53

#QuantumPhysics #BellInequality #History #Physics

Quantum Milestones, 1964: John Stewart Bell Quietly Rings in New Era of Quantum Theory

In 1964, Bell showed that quantum physics predicts correlations that violate certain inequalities. The work implied that quantum mechanics is not compatible with locality, even if there were “hidden variables” not accounted for in quantum theory.

Physics
Bell's Theorem: The Quantum Venn Diagram Paradox

YouTube

This is my all-time favourite physics experiment. I keep three 100mm^2 sheets of polaroid to stupefy people at dinner parties.

My gut feeling* is that it's locality that has to go.

#BellInequality

---
* I have a rule: never rely on gut feeling.
---
RT @MatjazLeonardis
Bell inequality is something I've wanted to have a more intuitive understanding of for a while and I feel like this video by @3blue1brown and @minutephysics (unli…
https://twitter.com/MatjazLeonardis/status/1528362011645681664

Matjaž Leonardis on Twitter

“Bell inequality is something I've wanted to have a more intuitive understanding of for a while and I feel like this video by @3blue1brown and @minutephysics (unlike ~10 other things I looked at) brought me materially closer to that! https://t.co/o5IavsZy1h”

Twitter