Finite Temperature Excitations of a Trapped Bose Gas
Finite Temperature Excitations of a Trapped Bose Gas
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俘获玻色气体的有限温度激发
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
Allan Griffin
中科院分区：
文献类型：
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作者：
D. Hutchinson;E. Zaremba;Allan Griffin
我们详细研究了抛物线陷阱中玻色凝聚气体的凝聚态和非凝聚态密度分布的温度依赖性。这些量是使用波波夫近似内的 Hartree-Fock-Bogoliubov 方程自洽计算的。在玻色-爱因斯坦跃迁以下，即使凝聚态强烈耗尽，激发频率也具有相对较弱的温度依赖性。当冷凝物密度通过转变变为零时，激发频率受到强烈影响并接近高温极限下非相互作用捕获气体的频率。 {版权} {ital 1997} {ital 美国物理学会}
We present a detailed study of the temperature dependence of the condensate and noncondensate density profiles of a Bose-condensed gas in a parabolic trap. These quantities are calculated self-consistently using the Hartree-Fock-Bogoliubov equations within the Popov approximation. Below the Bose-Einstein transition the excitation frequencies have a relatively weak temperature dependence even though the condensate is strongly depleted. As the condensate density goes to zero through the transition, the excitation frequencies are strongly affected and approach the frequencies of a noninteracting trapped gas in the high temperature limit. {copyright} {ital 1997} {ital The American Physical Society}