We investigate how nonlocal entanglement, as identified by violations of a Bell inequality, may be preserved during the evolution. Our system consists of two qubits each embedded in a zero-temperature 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 preservation of nonlocal entanglement can be correspondingly achieved.

Bellomo, B., Lo Franco, R., Compagno, G. (2009). Long-time preservation of nonlocal entanglement. ADVANCED SCIENCE LETTERS, 2009, 459-462 [10.1166/asl.2009.1054].

Long-time preservation of nonlocal entanglement

BELLOMO, Bruno;LO FRANCO, Rosario;COMPAGNO, Giuseppe
2009-01-01

Abstract

We investigate how nonlocal entanglement, as identified by violations of a Bell inequality, may be preserved during the evolution. Our system consists of two qubits each embedded in a zero-temperature 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 preservation of nonlocal entanglement can be correspondingly achieved.
2009
Settore FIS/02 - Fisica Teorica, Modelli E Metodi Matematici
Bellomo, B., Lo Franco, R., Compagno, G. (2009). Long-time preservation of nonlocal entanglement. ADVANCED SCIENCE LETTERS, 2009, 459-462 [10.1166/asl.2009.1054].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/50876
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