Violating Bell's inequalities in the vacuum

Details Violating Bell's inequalities in the vacuum Violating Bell's inequalities in the vacuum

2003-10-09

arxiv.org/abs/quant-ph/0310058v2

Phys. Rev. A 71, 042104 (2005)

Physics

Quantum Physics

4 pages, 3 figures. A discussion has been added on the nature of the relativistic corrections for the particle detectors. We a

Scientific paper

10.1103/PhysRevA.71.042104

We employ an approach wherein vacuum entanglement is directly probed in a controlled manner. The approach consists of having a pair of initially nonentangled detectors locally interact with the field for a finite duration, such that the two detectors remain causally disconnected, and then analyzing the resulting detector mixed state. It is demonstrated that the correlations between arbitrarily far-apart regions of the vacuum of a relativistic free scalar field cannot be reproduced by a local hidden-variable model, and that as a function of the distance L between the regions, the entanglement decreases at a slower rate than exp(-(L/cT)^3).

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