弱相互作用双组分费米气体中的反常自旋偏聚
Anomalous Spin segregation in a weakly interacting two-component Fermi gas
摘要：
我们解释了在杜克大学6Li的双组分气体中看到的自旋分离[Du，Luo，Clancy和Thomas，Phys. Rev. Lett. 101，150401（2008）]作为可通过无碰撞玻尔兹曼方程描述的平均场效应。正如在实验中看到的，我们发现，在两个自旋态的捕获势的微小差异驱动小的自旋电流。Hartree-Fock型相互作用将这些电流转换为能量空间中的种群重新分布，从而形成长寿的自旋织构。我们探讨了这些动力学的相互作用强度的依赖关系，发现与实验密切一致。
英文摘要：
We explain the spin segregation seen at Duke in a two-component gas of 6Li [Du, Luo, Clancy and Thomas, Phys. Rev. Lett. 101,150401 (2008)] as a mean-field effect describable via a collisionless Boltzmann equation. As seen in experiments, we find that slight differences in the trapping potentials in the two spin states drive small spin currents. Hartree-Fock type interactions convert these currents into a redistribution of populations in energy space, and consequently a long lived spin texture develops. We explore the interaction strength dependence of these dynamics, finding close agreement with experiment.
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