Quantum discord between relatively accelerated observers

Details Quantum discord between relatively accelerated observers Quantum discord between relatively accelerated observers

2009-05-20

arxiv.org/abs/0905.3301v1

Phys. Rev. A 80, 052304 (2009)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

We calculate the quantum discord between two free modes of a scalar field which start in a maximally entangled state and then undergo a relative, constant acceleration. In a regime where there is no distillable entanglement due to the Unruh effect, we show that there is a finite amount of quantum discord, which is a measure of purely quantum correlations in a state, over and above quantum entanglement. Even in the limit of infinite acceleration of the observer detecting one of the modes, we provide evidence for a non-zero amount of purely quantum correlations, which might be exploited to gain non-trivial quantum advantages.

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