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论文类型：期刊论文

发表时间：2014-01-03

发表刊物：PHYSICS LETTERS A

收录刊物：SCIE、Scopus

卷号：378

期号：1-2

页面范围：43-47

ISSN号：0375-9601

关键字：Feshbach resonance; Optical Feshbach; Dark state; Mean field approximation

摘要：We theoretically investigate optical control of magnetic Feshbach resonance in Bose gases with two optical fields. The two optical fields couple two ground states through an excited state. Compared with the usual single-optical scheme, two optical fields can greatly suppress the inelastic loss resulting from spontaneous emission by the destructive quantum interference. Using the mean field theory, the analytical formula of the scattering length is obtained. The results show that the scattering length can be modified in a large range by changing the Rabi frequency or the optical field frequency. The strong atom-molecule interaction has obvious effect on the scattering length. (C) 2013 Elsevier B.V. All rights reserved.