么正性费米混合物中的Al-Clogston极限和相分离
Chandrasekhar-Clogston limit and phase separation in Fermi mixtures at Unitarity
摘要：
利用多体理论的图解计算和{ \it ab initio} Monte Carlo计算结果，我们分析了零温下具有粒子数不平衡和质量不等的酉费米气体的相图$μ=(μ_{\uparrow}+μ_{\downarrow})/2$与$h=(μ_{\uparrow}-μ_{\downarrow})/2$.我们确定不同的区域，气体是超流，部分极化或完全极化，并确定相应的共存条件。在相图中的不对称性，所造成的质量不平衡，和它的效果上的临界极化的Erasekhar-Clogston限制明确讨论。在局域密度近似下，采用超流和正常相的状态方程，预测了谐波捕获势存在下的新型相分离构型。
英文摘要：
Using many-body results available from diagrammatic and {\it ab initio} Monte Carlo calculations we analyze the phase diagram $μ=(μ_{\uparrow}+μ_{\downarrow})/2$ versus $h=(μ_{\uparrow}-μ_{\downarrow})/2$ of a unitary Fermi gas at zero temperature with population imbalance and unequal masses. We identify different regions where the gas is superfluid, partially polarized or fully polarized and determine the corresponding coexistence conditions. The asymmetry in the phase diagram, caused by the mass imbalance, and its effect on the Chandrasekhar-Clogston limit for the critical polarization are explicitly discussed. The equation of state of the superfluid and normal phases is employed, within the local density approximation, to predict novel phase separated configurations in the presence of harmonic trapping potentials.
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