Statistical Difference in the Normal Phase of the Dipolar Ultracold Gases at Finite Temperatures
Statistical Difference in the Normal Phase of the Dipolar Ultracold Gases at Finite Temperatures
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DOI：
10.1143/jpsj.80.044006
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发表时间：
2011-04
影响因子：
1.7
通讯作者：
Y. Endo;T. Miyakawa;T. Nikuni
中科院分区：
文献类型：
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作者：
Y. Endo;T. Miyakawa;T. Nikuni
研究了有限温度下偶极玻色和费米气体的平衡性质。我们最近开发了有限温度下偶极费米气体相空间分布函数的变分模拟。我们扩展的变分形式主义玻色气体和讨论偶极相互作用与不同的统计热平衡的影响，特别强调在动量空间中的变形。我们通过改变温度、陷阱纵横比和偶极矩来研究系统的稳定性。此外，我们讨论了如何在高温状态下观察到真实的和动量空间中的变形，这与JILA [Ni et al.：Science 322（2008）231]和东京大学[Aikawa et al.：New J. Phys. 11（2009）055035]的当前实验相关。
We study the equilibrium properties of dipolar Bose and Fermi gases at finite temperatures. We have recently developed a variational ansatz for the phase-space distribution function of a dipolar Fermi gas at finite temperatures. We extend the variational formalism to a Bose gas and discuss the effect of dipolar interactions with different statistics on thermal equilibrium, with particular emphasis on deformation in momentum space. We examine the stability of the system by varying the temperature, trap aspect ratio, and dipole moment. In addition, we discuss how deformation in both real and momentum spaces can be observed in the high-temperature regime, which is relevant for the current experiments at JILA [Ni et al. : Science 322 (2008) 231] and at the University of Tokyo [Aikawa et al. : New J. Phys. 11 (2009) 055035].