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Entanglement and discord: accelerated observations of local and global modes

We investigate the amount of entanglement and quantum discord extractable from a two mode squeezed state as considered from the viewpoint of two observers, Alice (inertial) and Rob (accelerated). We find that using localized modes produces qualitatively different correlation properties for large accelerations than do Unruh modes. Specifically, the entanglement undergoes a sudden death as a function of acceleration and the discord asymptotes to zero in the limit of infinite acceleration. We conclude that the previous Unruh mode analyses do not determine the acceleration dependent entanglement and discord degradation of a given quantum state.

preprint2013arXivOpen access
Jason DoukasEric G. BrownAndrzej DraganRobert Mann
quant-ph
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Jason DoukasEric G. BrownAndrzej DraganRobert Mann

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