论文标题
在二维晶格中排斥的费米气体，具有非亚洲量规场
Repulsive Fermi gases in a two-dimensional lattice with non-Abelian gauge fields
论文作者
论文摘要
在最近的实验中，实现了双向自旋轨道耦合的玻色 - 因斯坦冷凝水（BEC），我们从理论上探索了在二维（2D）光学晶格中具有此类非亚伯利亚仪表场的排斥性费米子的性质。在平均场水平范围内，我们发现了拓扑抗铁磁（TAFM）的新阶段，该阶段既包含了由于自旋流向跳转和自发对称性破坏（SSB），均包含了平面自旋顺序的自发对称性破坏（SSB）。我们认为，这种阶段的外观对于通过自旋轨道耦合实现的Chern带中的排斥性费米是一般性。我们的工作为进一步研究2D非亚伯旋转轨道偶联量子气的典型概括为进一步研究铺平了道路。
Motivated by the recent experiment realizing bidirectional spin-orbit-coupled Bose-Einstein condensates (BEC), we theoretically explore the properties of repulsive fermions in the two-dimensional (2D) optical lattice with such non-Abelian gauge fields. Within the mean-field level, we find a novel phase of topological antiferromagnetic (TAFM) order which incorporates both the non-trivial topology due to spin-flip hopping and spontaneous symmetry breaking (SSB) for the in-plane spin order. We argue that the appearance of such a phase is generic for repulsive fermions in Chern bands achieved through spin-orbit coupling. Our work paves the way for further studies of fermionic generalization of 2D non-Abelian spin-orbit-coupled quantum gases.
