Thermodynamic properties of a condensed 39K Bose gas in a harmonic trap
Thermodynamic properties of a condensed 39K Bose gas in a harmonic trap
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DOI：
10.1016/j.physb.2012.10.028
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发表时间：
2013-02-01
影响因子：
2.8
通讯作者：
Soliman, Shemi S. M.
中科院分区：
文献类型：
--
作者：
El-Badry, Azza M.;Hassan, Ahmed S.;Soliman, Shemi S. M.
本文研究了有限原子数K-39玻色气体在简谐势中的热力学行为。在考虑粒子总数N守恒的条件下，利用修正的半经典近似，我们解析地导出了激发态热原子数的简单显式表达式.这一修改保证同时包括有限尺寸和间接的原子间相互作用效应。通过图形表示预测了各种实验的临界原子数及其相应的温度。计算结果表明，势函数的参数与势函数的大小、形状和谐波性质密切相关。计算的临界原子数与Tammuz等人[3]和Smith等人[4]报道的K-39（，）的测量实验结果一致。(c)2012 Elsevier B. V.保留所有权利。
In this paper, the thermodynamic behavior of a K-39 Bose gas with a finite number of atoms confined in a harmonic potential is investigated. By taking into account the conservation of the total number of particles N and using a modified semiclassical approximation, we derive analytically the simple explicit expression for the thermal atoms number in the excited state. This modification assures to include, finite size and indirectly the interatomic interaction effects simultaneously. Various experimental, the critical atoms number and its corresponding temperature are predicted via the graphical representation. The calculated results show that the thermodynamical parameters depend critically on the size, shape, and harmonic nature of the potential. The calculated critical atoms number are coincide with the measured experimental results for K-39(,) as reported in Tammuz et al. [3] and Smith et al. [4]. (c) 2012 Elsevier B.V. All rights reserved.