Wednesday, 20 January 2016

Realism is going to stay for a while

What Bell did by Tim Maudlin.

"EPR had already ruled out local indeterministic theories, and “On the Einstein-Podolosky-Rosen paradox” ruled out local deterministic theories. Between the two of them, they licked the platter clean. Locality must be abandoned."

So as long as there is no inequality theorem which rules out the theory of Bohmian mechanics (a non-local deterministic theory), realism is going to stay for a while. Thanks to Tim Maudlin for clearing out some of the misconceptions of what Bell's theorem proves and what are its implications to our place in the cosmos.

Kochen-specker theorem does not rule out hidden variable theories as long as the hidden variable theories are Contextual. Bohmian mechanics is one such theory which fully reproduces the behaviour of standard quantum mechanics where all other properties of the system are contextual in nature except the position of the particles.

Contextuality in Bohmian Mechanics