Speaker
Tomer Barnea
(Université de Genève)
Description
The talk will explore the possibility to explain quantum correlations via
(possibly) unknown causal influences propagating gradually and continuously
at a finite speed v > c. This framework goes beyond quantum theory in the
sense that it tries to provide an explanation for Bell inequality violating
correlations that remains local and continuous in space and time. In
previous work it could be shown that the assumption of superluminal yet
finite-speed influences carrying information about the measurements
performed in combination with shared randomness leads to correlations that
can be exploited for superluminal communication. This was achieved studying
the set of possible correlations that are allowed within such a model and
comparing them to correlations produced by local measurements on a
four-party entangled quantum state. This talk will report on a quantum state
that allows for the same conclusion involving only three parties.
It is based on work presented in Phys. Rev. A 88, 022123 (2013).
