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I was just reading this paper:
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.130401
It essentially shows that if the dynamics of the signalling mechanism in a nonlocal hidden variable theory were computable, then Alice and Bob in the typical EPR set up could use it to signal to each other faster than light.
Just to note there is an assumption that the hidden variable state ##\lambda## can be resolved or fully known, Bohmian Mechanics for example escapes the result by having fundamentally unknowable initial conditions (though even there the complexity class of Bohmian mechanics is larger than that of a quantum computer, ##BQP##)
I have seen little discussion of the result outside of the doctoral thesis of one of the authors:
http://www.glyc.dc.uba.ar/santiago/papers/thesisSenno.pdf
Do people here have any opinions on the result?
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.130401
It essentially shows that if the dynamics of the signalling mechanism in a nonlocal hidden variable theory were computable, then Alice and Bob in the typical EPR set up could use it to signal to each other faster than light.
Just to note there is an assumption that the hidden variable state ##\lambda## can be resolved or fully known, Bohmian Mechanics for example escapes the result by having fundamentally unknowable initial conditions (though even there the complexity class of Bohmian mechanics is larger than that of a quantum computer, ##BQP##)
I have seen little discussion of the result outside of the doctoral thesis of one of the authors:
http://www.glyc.dc.uba.ar/santiago/papers/thesisSenno.pdf
Do people here have any opinions on the result?