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.
Lingua originaleEnglish
pagine (da-a)459-462
Numero di pagine4
RivistaAdvanced Science Letters
Volume2009
Stato di pubblicazionePublished - 2009

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