Does quantum entanglement violate locality or causality?

by Prof. Nathan Argaman

NNRC

at Quantum optics seminar

Wed, 24 Jan 2024, 16:00
Zoom Only

Abstract

Zoom link: https://us02web.zoom.us/j/88597563096?pwd=cFIzczZEWGdMVDBpTXZNZVdCVmpnQT09

Abstract:
Bell's Theorem is often wrongly described as ruling out models with hidden variables. When this is corrected, locality is generally emphasized: only local hidden-variable models are ruled out. However, this too is oversimplified: only locally causal models, conforming to a particularly strong causality condition, are excluded. This talk is devoted to local-hidden-variable models in which Bell's version of the causal arrow of time is violated, and only initial and final conditions break time-reversal symmetry. A simple toy-model reproducing the predictions for specific singularly quantum systems will be described. This model has been known to successfully reproduce both one-particle (Leggett-Garg) and two-particle (Bell) quantum correlations [1]. The present work extends this to the three-particle, Greenberger-Horne-Zeilinger, case [2]. Generalizing this approach into a full reformulation of quantum mechanics and/or quantum field theory remains a Grand Challenge.

[1] Wharton and Argaman, Rev. Mod. Phys. 92, 021002 (2020).
[2] Neder and Argaman, arXiv:2401.09398 (2024).

Created on 21-01-2024 by Folman, Ron (folman)
Updaded on 21-01-2024 by Folman, Ron (folman)