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Indexed by:期刊论文

Date of Publication:2014-01-03

Journal:PHYSICS LETTERS A

Included Journals:SCIE、Scopus

Volume:378

Issue:1-2

Page Number:43-47

ISSN No.:0375-9601

Key Words:Feshbach resonance; Optical Feshbach; Dark state; Mean field approximation

Abstract: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.