Coexisting Condensates of Weakly Interacting Bose Gas in a Harmonic Trap |
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Authors: | MIAO Yuan-Xiu YANG Hong-Yu ZHAI Hui CHANG Lee |
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Affiliation: | Center for Advanced Study, Tsinghua University, Beijing 100084, China |
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Abstract: | We study particles in a vortex state driven to a core state with lower energy and zero angular momentum by the trap potential asymmetries. We find that at T=0 when the role of thethermal gas can be ignored, there will be coexisting condensates. We also calculate the fluctuation of the number difference and argue that in certain range of the parameters the state of thewhole system is the macroscopic quantum self-trapping in the Josephson tunnelling regime. |
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Keywords: | Bose-Einstein condensate vortex Josephson tunnelling |
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