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arXiv 1008.1192cond-mat.quant-gascond-mat.supr-con
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阱中旋转玻色气体的热力学

Thermodynamics of rotating Bose gases in a trap

Jinghan Fan, Qiang Gu, Wei Guo

摘要:

在中性冷原子的背景下,人们对旋转玻色气体的新的基态性质进行了深入的研究。以处于磁场中的荷电理想玻色气体(相当于处于合成磁场中的中性气体)为例,从热力学角度研究了势阱中的旋转玻色气体.结果表明,玻色-爱因斯坦凝聚温度与磁场无关,这与临界温度随磁场增加而降低的直觉相矛盾.比热和朗道抗磁性也表现出有趣的行为。相反,我们证明了中性玻色气体在旋转框架中的凝聚温度在快速旋转极限下下降到零,这表明在基态中存在非凝聚量子相。

英文摘要:

Novel ground state properties of rotating Bose gases have been intensively studied in the context of neutral cold atoms. We investigate the rotating Bose gas in a trap from a thermodynamic perspective, taking the charged ideal Bose gas in magnetic field (which is equivalent to a neutral gas in a synthetic magnetic field) as an example. It is indicated that the Bose-Einstein condensation temperature is irrelevant to the magnetic field, conflicting with established intuition that the critical temperature decreases with the field increasing. The specific heat and Landau diamagnetization also exhibit intriguing behaviors. In contrast, we demonstrate that the condensation temperature for neutral Bose gases in a rotating frame drops to zero in the fast rotation limit, signaling a non-condensed quantum phase in the ground state.

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。

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