Free Expansion of a Weakly-Interacting Dipolar Fermi Gas
Free Expansion of a Weakly-Interacting Dipolar Fermi Gas
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DOI：
10.1143/jpsj.79.083001
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发表时间：
2009-07
影响因子：
1.7
通讯作者：
T. Nishimura;T. Maruyama
中科院分区：
文献类型：
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作者：
T. Nishimura;T. Maruyama
从理论上研究了极化偶极费米气体的自由膨胀。粒子间偶极相互作用使陷阱中的相空间分布变形，也使膨胀中的相空间分布变形。我们精确地预测了高温Maxwell-Boltzmann和零温Maxwell-Fermi气体在Hartree-Fock和Landau-Vlasov方法中膨胀的最小四极形变。总之，我们提供了一个适当的方法来发展的飞行时间方法的弱相互作用的偶极费米气体，也揭示了一个标度律与刘维尔定理的长时间行为的两种气体。
We theoretically investigate a polarized dipolar Fermi gas in free expansion. The inter-particle dipolar interaction deforms phase-space distribution in trap and also in the expansion. We exactly predict the minimal quadrupole deformation in the expansion for the high-temperature Maxwell–Boltzmann and zero-temperature Thomas–Fermi gases in the Hartree–Fock and Landau–Vlasov approaches. In conclusion, we provide a proper approach to develop the time-of-flight method for the weakly-interacting dipolar Fermi gas and also reveal a scaling law associated with the Liouville's theorem in the long-time behaviors of the both gases.