Phase Separation in two-Species Atomic Bose-Einstein Condensate with Interspecies Feshbach Resonance

Lu Zhou; Jing Qian; Han Pu; weiping zhang; Hong Y. Ling

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Phase Separation in two-Species Atomic Bose-Einstein Condensate with Interspecies Feshbach Resonance

Lu Zhou 1 #,Jing Qian 1,Han Pu 2,weiping zhang 1 *,Hong Y. Ling 3

1.State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University

2.Department of Physics and Astronomy, and Rice Quantum Institute, Rice University

3.Department of Physics and Astronomy, Rowan University

*Correspondence author

#Submitted by

Subject:

Funding: National Natural Sci-ence Foundation of China under Grant,973 Program,Doctoral Program of Higher Education under Grant （No.10588402,10474055,2006CB921104,20040003101）

Opened online:15 October 2008

Accepted by: none

Citation: Lu Zhou,Jing Qian,Han Pu.Phase Separation in two-Species Atomic Bose-Einstein Condensate with Interspecies Feshbach Resonance[OL]. [15 October 2008] http://en.paper.edu.cn/en_releasepaper/content/24823

We consider a mixture of two-species atomic Bose-Einstein codensates coupled to a bound molecular state at zero temperature via interspecies Feshbach resonance. The interspecies Feshbach coupling precludes the possibility of doubly mixed phases while enables not only the pure molecular superfluid but also the pure atomic superfluids to exist as distinct phases. We show that this system is able to support a rich set of phase separations, including that between two distinct mixed atom-molecule phases. We pay particular attention to the effects of the Feschbach coupling and the particle collisions on the miscibility of this multi-component condensate system.

Keywords:Bose-Einstein condensate;phase separation;Feshbach resonance;heteronuclear

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