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  

Phase Diagram of Spin-orbit Coupled Dipolar Fermions in a One-dimensional Optical Lattice

作　　者：周晓凡[1,2] 蒙雅 陈刚[1,2] 

机构地区：[1]山西大学激光光谱研究所量子光学与光量子器件国家重点实验室,山西太原030006 [2]山西大学极端光学协同创新中心,山西太原030006

出　　处：《山西大学学报（自然科学版）》2017年第3期492-498,共7页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(批准号:11422433);国家自然科学基金(批准号:11674200)

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-dimen- sional 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 sys- tem has rich quantum phases. By calculating entanglement spectrums, density distributions and spin-corre- lation functions, we predict four quantum phases, including a phase separation phase, a charge-density wave phase, an antiferromagnetic Mott insulator, and a nontrivial topological insulator.

关 键 词：偶极费米气体 密度矩阵重整化群算法 自旋-轨道耦合 

分 类 号：O469[理学—凝聚态物理]