A lower bound for the velocity of quantum communications in the preferred frame

Details A lower bound for the velocity of quantum communications in the preferred frame A lower bound for the velocity of quantum communications in the preferred frame

2010-06-14

arxiv.org/abs/1006.2697v3

Physics Letters A 375 (2011), pp. 379-384

Physics

Quantum Physics

9 pages, 9 figures; 1 figure deleted (previous fig 8). Changements in section 4 after referee comments

Scientific paper

10.1016/j.physleta.2010.10.064

An EPR experiment with polarized entangled photons is performed to test the Eberhard model. According to the Eberhard model, quantum correlations between space-like separated events are due to a superluminal communication signal propagating in a preferred frame. The coincidences between entangled photons passing through two polarizers aligned along a East-West axis are measured as a function of time during 21 sidereal days. No deviation from the predictions of the Quantum Theory is observed. Tacking into account for the experimental uncertainties, we infer that, if a preferred frame for superluminal signals exists which moves at velocity \vec{v} with respect to the Earth, the modulus of the velocity of quantum communications in this frame has to be greater than v_{t}~0.6*10^4 c for v<0.1 c and for any arbitrary direction of \vec{v}.

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