Role of interactions in spin-polarized atomic Fermi gases at unitarity
Role of interactions in spin-polarized atomic Fermi gases at unitarity
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DOI：
10.1103/physreva.78.023633
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发表时间：
2008-03
影响因子：
2.9
通讯作者：
A. Recati;Carlos Lobo;S. Stringari
中科院分区：
文献类型：
--
作者：
A. Recati;Carlos Lobo;S. Stringari
通过假设非极化超流和极化正相之间的相分离，研究了被囚禁的极化费米气体在么正性下的零温性质。考虑到相互作用的影响，使用准粒子的形式主义建立的状态方程的正常相的Monte Carlo结果的相关参数。我们的预测的临界极化和密度分布，包括在界面处的密度跳跃的Pracrasekhar-Clogston极限，证实了在麻省理工学院最近的实验结果具有很好的精度。还讨论了相互作用对少数分量的径向宽度、谱函数的差距和正相自旋振荡的影响。我们的分析指出，费米液体的性质，这些强相互作用的自旋极化配置。
We study the zero temperature properties of a trapped polarized Fermi gas at unitarity by assuming phase separation between an unpolarized superfluid and a polarized normal phase. The effects of the interaction are accounted for using the formalism of quasiparticles to build up the equation of state of the normal phase with the Monte Carlo results for the relevant parameters. Our predictions for the Chandrasekhar-Clogston limit of critical polarization and for the density profiles, including the density jump at the interface, are confirmed with excellent accuracy by the recent experimental results at MIT. The role of interaction on the radial width of the minority component, on the gap of spectral functions, and on the spin oscillations in the normal phase is also discussed. Our analysis points out the Fermi liquid nature of these strongly interacting spin-polarized configurations.