优选系中量子通信速度的一个下界
A lower bound for the velocity of quantum communications in the preferred frame
摘要：
利用极化纠缠光子的EPR实验验证了Eberhard模型。根据Eberhard模型，类空分离事件之间的量子关联是由于超光速通信信号在优选帧中传播。在21个恒星日期间，测量了纠缠光子通过沿东西轴排列的两个偏振器之间的符合作为时间的函数。没有观察到偏离量子理论的预测。考虑到实验的不确定性，我们推断，如果超光速信号存在一个相对于地球以速度\vec{v}运动的优选坐标系，那么对于v<0.1 c和\vec{v}的任意方向，该坐标系中量子通信的速度模必须大于v_{t} ~0.6*10^4 c。
英文摘要：
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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