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论文类型：期刊论文

发表时间：2009-05-25

发表刊物：PHYSICS LETTERS A

收录刊物：SCIE

卷号：373

期号：23-24

页面范围：2017-2020

ISSN号：0375-9601

关键字：Output entanglement; Two-mode cavities; A single atom

摘要：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.