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原文連結
論文資訊
- 類型：已發表論文
- 日期：2012
摘要
We discuss the mean-field theories obtained from the leading order in a large-N approximation for one- and two-component dilute Bose gases. For a one-component Bose gas, this approximation has the following properties: the Bose-Einstein condensation (BEC) 相變 is second order but the critical temperature T-c is not shifted from the noninteracting gas value T-0. The spectrum of excitations in the BEC phase resembles the Bogoliubov dispersion with the usual coupling constant replaced by the running coupling constant which depends on both temperature and momentum. We then study two-component Bose gases with both inter- and intra物種 interactions and focus on the stability of the mixture state above T-c. Our mean-field approximation predicts an instability from the mixture state to a phase-separat
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