Entanglement and discord: accelerated observations of local and global modes

Abstract

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.

6 pages, 3 figures. Minor updates in v2

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Cited by in corpus (5)

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• Enhancing entanglement, local and non-local information of accelerated two-qubit and two- qutrit systems via weak-reverse measurements
• What does it mean for half of an empty cavity to be full?
• Environment generated quantum correlations in bipartite qubit-qutrit systems
• Unruh acceleration effect on the precision of parameter estimation