Long-time Protection of Nonlocal Entanglement

Details Long-time Protection of Nonlocal Entanglement Long-time Protection of Nonlocal Entanglement

2008-10-15

arxiv.org/abs/0810.2783v1

Advanced Science Letters 2, 459 (2009)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1166/asl.2009.1054

We investigate how nonlocal entanglement, as identified by violations of a Bell inequality, may be protected during the evolution. Our system consists of two qubits each embedded in a bosonic reservoir evolving independently and initially in an entangled mixed state. We show that the violation of the Bell inequality can be related to the single-qubit population of excited state in such a way that, by appropriately choosing structured environments that give rise to sufficiently high values of population trapping, long-time protection of nonlocal entanglement can be correspondingly achieved.

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