Ken Wharton Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” While it is generally known that retrocausal models can provide an account of Bell-inequality violations in terms of spacetime-local beables, new models can now explicitly show how this comes about. By analyzing a simple local-beable model that precisely recovers the quantum joint probabilities for measurements on… Read more →
This is a polemical response to Howard Wiseman’s recent paper, “The two Bell’s theorems of John Bell”. Wiseman argues that, in 1964, Bell established a conflict between the quantum mechanical predictions and the joint assumptions of determinism and (what is now usually known as) “parameter independence”. Only later, in 1976, did Bell, according to Wiseman, fi rst establish a conflict between… Read more →
I would like to begin with Bell’s remark on the possibility that the beables are non-local, which Tim Maudlin quotes. “Of course, we may be obliged to develop theories in which there are no strictly local beables. That possibility will not be considered here[1].” When I read that yesterday I was astounded because it made me realize that ever since encountering Bell’s theorem as… Read more →
Sheldon Goldstein Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” A memorial conference for John Bell, open to the public, was held at Rutgers University around 20 years ago. I gave there a short talk on Bell’s views about David Bohm’s “hidden variables” formulation of quantum mechanics, a version of quantum mechanics often called the de… Read more →
Henry P. Stapp Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” The Bell’s theorem proofs are rightly identified as proofs of the incompatibility of “local realism” with the predictions of quantum mechanics. But “local realism” brings in both alien-to-quantum-theory classical concepts and also an “outcome independence” condition whose inclusion nullifies those theorems as possible proofs of… Read more →
Marco Genovese Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” 1964 was a wonderful year for physics, in this “annus mirabilis”, summarising and simplifying a little, quark model was proposed by Gell-Mann and Zweig and charm and colour properties were introduced, Higgs published his work on the scalar boson, $\Omega$ boson and CP violation were discovered,… Read more →
Travis Norsen Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” J.S. Bell’s remarkable 1964 theorem showed that any theory sharing the empirical predictions of orthodox quantum mechanics would have to exhibit a surprising — and, from the point of view of relativity theory, very troubling — kind of non-locality. Unfortunately, even still on this 50th anniversary,… Read more →
Harvey R. Brown and Christopher G. Timpson Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” Between 1964 and 1990, the notion of nonlocality in Bell’s papers underwent a profound change as his nonlocality theorem gradually became detached from quantum mechanics, and referred to wider probabilistic theories involving correlations between separated beables. The proposition that standard quantum mechanics… Read more →
Gregg Jaeger Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” John S. Bell, of course, is most well known for the result now referred to simply as “Bell’s theorem”, which removed from consideration the class of so-called local hidden-variable theories which at the time of its publishing appeared to be the most natural class of theories… Read more →
Tim Maudlin Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” John Bell’s most celebrated contribution to the foundations of physics is his famous theorem. The theorem demonstrates that any physical theory capable of generating the predictions of the standard quantum-mechanical algorithm, in particular the prediction of violations of Bell’s inequality for experiments done at space-like separation,… Read more →
Jean Bricmont Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem” The goal of this paper is to give a pedagogical introduction to Bell’s theorem and its implication for our view of the physical world, in particular how it establishes the existence of non local effects or of actions at a distance. We also discuss several misunderstandings… Read more →
