Anomalous particle-number fluctuations in a three-dimensional interacting Bose-Einstein condensate

Physical Review A 68, 065601 (2003) The particle-number fluctuations originated from collective excitations are investigated for a three-dimensional, repulsively interacting Bose-Einstein condensate (BEC) confined in a harmonic trap. The contribution due to the quantum depletion of the condensate is...

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Bibliographic Details
Main Authors Liu, Shujuan, Xiong, Hongwei, Huang, Guoxiang, Xu, Zhijun
Format Journal Article
LanguageEnglish
Published 08.01.2004
Subjects
Physics - Soft Condensed Matter
Physics - Statistical Mechanics
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Summary:Physical Review A 68, 065601 (2003) The particle-number fluctuations originated from collective excitations are investigated for a three-dimensional, repulsively interacting Bose-Einstein condensate (BEC) confined in a harmonic trap. The contribution due to the quantum depletion of the condensate is calculated and the explicit expression of the coefficient in the formulas denoting the particle-number fluctuations is given. The results show that the particle-number fluctuations of the condensate follow the law $<\delta N_0^2> \sim N^{22/15}$ and the fluctuations vanish when temperature approaches to the BEC critical temperature.
DOI:10.48550/arxiv.cond-mat/0401112