We study the superfluid behavior of a population imbalanced ultracold atomic Fermi gases with a short range attractive interaction in a one-dimensional (1D) optical lattice, using a pairing fluctuation theory. We find a new mechanism for pair hopping, assisted by the excessive majority fermions. A BEC superfluid exists only in a limited region of the parameter space, where, this mechanism, together with the quasi-two dimensionality and the continuum-lattice mixing effect, leads to an unusual constant BEC asymptote for Tc that is independent of pairing strength, in contrast to the 3D continuum or dilute 3D lattice case. On the BEC side of unitarity, a small population imbalance may strongly enhance superfluidity by raising Tc dramatically.

中文翻译：

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一维光学晶格中的人口不平衡对原子费米气体超流动性的异常破坏和增强

我们使用配对涨落理论研究了一维 (1D) 光学晶格中具有短程吸引力相互作用的群体不平衡超冷原子费米气体的超流体行为。我们发现了一种新的配对跳跃机制，由过多的多数费米子辅助。BEC 超流体仅存在于参数空间的有限区域中，这种机制与准二维和连续晶格混合效应一起导致 Tc 的异常恒定 BEC 渐近线与配对强度无关，与 3D 连续体或稀释的 3D 晶格情况相反。在单一性的 BEC 方面，少量的人口不平衡可能会通过显着提高 Tc 来强烈增强超流性。