有限温度下的偶极玻色-爱因斯坦凝聚体
Dipolar Bose-Einstein condensates at Finite temperature
摘要：
在波波夫近似下，利用Hartree-Fock-Bogoliubov（HFB）理论研究了有限温度下具有偶极相互作用的稀薄气体的玻色-爱因斯坦凝聚体（BEC）.为了便于计算，还提出了一个偶极交换相互作用的近似。本文计算了柱对称简谐势阱中凝聚态的凝聚分数随温度的变化关系。我们证明了在文献\cite{Ronen07}中发现的双凹形凝聚体在零温下在某些饼状阱中也是稳定的。令人惊讶的是，这些结构化冷凝物的中心密度的下降实际上在低的有限温度下得到增强。我们解释了这种效果。
英文摘要：
We study a Bose-Einstein condensate (BEC) of a dilute gas with dipolar interactions, at finite temperature, using the Hartree-Fock-Bogoliubov (HFB) theory within the Popov approximation. An additional approximation involving the dipolar exchange interaction is made to facilitate the computation. We calculate the temperature dependence of the condensate fraction of a condensate confined in a cylindrically symmetric harmonic trap. We show that the bi-concave shaped condensates found in Ref. \cite{Ronen07} in certain pancake traps at zero temperature, are also stable at finite temperature. Surprisingly, the dip in the central density of these structured condensates is actually enhanced at low finite temperatures. We explain this effect.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
