一维光学晶格中自旋-轨道耦合的超冷偶极费米气体的相图

摘要

利用两束蓝失谐的激光构建了一维光学晶格中自旋-轨道耦合的超冷偶极费米气体,并运用密度矩阵重整化群算法研究了该系统的基态特性.在短程和偶极长程相互作用的共同影响下,系统存在丰富的量子相.通过计算纠缠谱、粒子数密度分布和自旋关联函数,发现系统存在四个量子相:相分离相、电荷密度波相、反铁磁莫特绝缘体和非平庸的拓扑绝缘体.%We propose an experimental scheme to realize spin-orbit coupled dipolar fermions in a one-dimensional optical lattice by only utilizing two blue-detuned lasers,and then obtain its ground-state properties by the density matrix renormalization group.With both the on-site and dipole-dipole interactions,the system has rich quantum phases.By calculating entanglement spectrums,density distributions and spin-correlation functions,we predict four quantum phases,including a phase separation phase,a charge-density wave ohase,an antiferromagnetic Mott insulator,and a nontrivial topological insulator.