Quantum nonlocality based on finite-speed causal influences leads to superluminal signaling

Details Quantum nonlocality based on finite-speed causal influences leads to superluminal signaling Quantum nonlocality based on finite-speed causal influences leads to superluminal signaling

2011-10-17

arxiv.org/abs/1110.3795v1

Physics

Quantum Physics

Scientific paper

The experimental violation of Bell inequalities using spacelike separated measurements precludes the explanation of quantum correlations through causal influences propagating at subluminal speed. Yet, it is always possible, in principle, to explain such experimental violations through models based on hidden influences propagating at a finite speed v>c, provided v is large enough. Here, we show that for any finite speed v>c, such models predict correlations that can be exploited for faster-than-light communication. This superluminal communication does not require access to any hidden physical quantities, but only the manipulation of measurement devices at the level of our present-day description of quantum experiments. Hence, assuming the impossibility of using quantum non-locality for superluminal communication, we exclude any possible explanation of quantum correlations in term of finite-speed influences.

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