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Indexed by:期刊论文

Date of Publication:2009-05-25

Journal:PHYSICS LETTERS A

Included Journals:SCIE

Volume:373

Issue:23-24

Page Number:2017-2020

ISSN No.:0375-9601

Key Words:Output entanglement; Two-mode cavities; A single atom

Abstract:A single four-level atom interacting with two-mode cavities is investigated. Under large detuning condition. we obtain the effective Hamiltonian which is unitary squeezing operator of two-mode fields. Employing the input-output theory, we find that the entanglement and squeezing of the output fields can be achieved. By analyzing the squeezing spectrum, we show that asymmetric detuning and asymmetric atomic initial state split the squeezing spectrum from one valley into two minimum Values, and appropriate leakage of the cavity is needed for obtaining output entangled fields. (C) 2009 Elsevier B.V. All rights reserved.