简谐势阱中有限粒子数二维玻色气体性质的数值分析  

Numerical Analysis of Bose-Einstein Condensation with Finite Number of Particles in a Two-Dimensional Harmonic Oscillator Potential

作　　者：周照群[1] 苏国珍[1] 陈丽璇[1] 

机构地区：[1]厦门大学物理学系,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2001年第4期862-867,共6页Journal of Xiamen University：Natural Science

基　　金：福建省自然科学基金资助项目 (A970 10 )

摘　　要：应用数值计算方法对二维简谐势阱中有限粒子数的理想玻色气体的性质进行了数值分析 ,讨论了系统在产生 BEC时的一些物理量 .结果表明 ,在粒子数 N为有限的情况下 ,基态的粒子占有率随温度的变化规律是平滑的 ;系统的热容始终是连续的 ;零点能的考虑与否并不影响系统的 BEC特性 。The properties of Bose Einstein condensation with finite number of particles in a two dimensional harmonic oscillator potential are studied by using numerical analysis. In this way, it can be seen that the fraction N 0/N is changing gently with the function of T/T C and the heat capacity in all the temperature area is continuous. Considering the energy at ground state may effect the fugacity in this system, but it does not have any effect on the properties of the system.

关 键 词：玻色-爱因斯坦凝聚 临界温度 热容 数值分析 理想玻色气体 二维简谐势阱 有限粒子数 

分 类 号：O562.2[理学—原子与分子物理] O414.2[理学—物理]