自旋极化费米原子气体中相互作用的作用
The role of interactions in spin-polarised atomic Fermi gases at unitarity
摘要：
通过假设非极化超流和极化正相之间的相分离，研究了囚禁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，建立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径向宽度、RF跃迁能隙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。
英文摘要：
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 using the formalism of quasi-particles 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 the RF transition 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.
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