论文标题
光学晶格中的自旋 - 轨道 - 角摩肌耦合气体的量子阶段
Quantum phases of spin-orbital-angular-momentum coupled bosonic gases in optical lattices
论文作者
论文摘要
自旋轨道耦合在理解外来量子相中起着重要作用。在这项工作中，我们提出了一种结合旋转轨道 - 角摩肌（SOAM）耦合和超电原子气体中强相关性的方案。这种设置的基本要素是由激光制造的soam耦合和拉曼诱导的自旋跳跃跳跃的相互作用，这些激光器伴随着不同的超精细旋转状态。在仅存在SOAM耦合的情况下，我们在莫特构造的方案中发现了丰富的量子相，这些量子阶段支持不同类型的自旋缺陷，例如自旋涡流和复合涡流，并带有抗铁磁芯，被外旋转涡流包围。基于有效的交换模型，我们发现这些竞争性的自旋纹理是Dzyaloshinskii-Moriya和Heisenberg交换相互作用的相互作用的结果。在存在SOAM耦合和拉曼引起的自旋翼跳跃的情况下，出现了更多的多体相，包括倾斜的抗铁磁性和条纹相。我们的预测表明，在强烈相互作用的方案中，浸泡耦合可以诱导丰富的异国情调多体阶段。
Spin-orbit coupling plays an important role in understanding exotic quantum phases. In this work, we present a scheme to combine spin-orbital-angular-momentum (SOAM) coupling and strong correlations in ultracold atomic gases. Essential ingredients of this setting is the interplay of SOAM coupling and Raman-induced spin-flip hopping, engineered by lasers that couples different hyperfine spin states. In the presence of SOAM coupling only, we find rich quantum phases in the Mott-insulating regime, which support different types of spin defects such as spin vortex and composite vortex with antiferromagnetic core surrounded by the outer spin vortex. Based on an effective exchange model, we find that these competing spin textures are a result of the interplay of Dzyaloshinskii-Moriya and Heisenberg exchange interactions. In the presence of both SOAM coupling and Raman-induced spin-flip hopping, more many-body phases appear, including canted-antiferromagnetic and stripe phases. Our prediction suggests that SOAM coupling could induce rich exotic many-body phases in the strongly interacting regime.
