均匀相互作用玻色气体的凝聚温度

Condensation Temperature of Uniform Interacting Bose Gases

最近人们已经在实验中实现了弱相互作用玻色气体的玻色—爱因斯坦凝聚。相互作用玻色气体的凝聚温度是玻色—爱因斯坦凝聚问题中一个重要的热力学量。运用膺势方法和巨正则分布 ,作者对盒子中相互作用玻色气体的凝聚温度给予了详细考察。研究表明凝聚温度的移动为δTc/Tc=- 2 .9an1/3。

The Bose-Einstein condensation (BEC) of weakly interacting Bose gases has been realized recently in experiment. The condensation temperature of a uniform interacting Bose gas is an important thermodynamic quantity fot the BEC. In this paper, the pseudopotential method and grand canonical ensemble are used to investigate the condensation temperature of the uniform interacting Bose gas. The results show that, due to the interaction between particles, the shift of the condensation temperature is δT c/T c=-2.9an 1/3 , where a and n are the two-particle scattering length of S- wave and the particle number density, respectively.