Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland.
Phys Rev Lett. 2018 Jun 1;120(22):223602. doi: 10.1103/PhysRevLett.120.223602.
We observe cavity mediated spin-dependent interactions in an off-resonantly driven multilevel atomic Bose-Einstein condensate that is strongly coupled to an optical cavity. Applying a driving field with adjustable polarization, we identify the roles of the scalar and the vectorial components of the atomic polarizability tensor for single and multicomponent condensates. Beyond a critical strength of the vectorial coupling, we infer the formation of a spin texture in a condensate of two internal states from the analysis of the cavity output field. Our work provides perspectives for global dynamical gauge fields and self-consistently spin-orbit coupled gases.
我们在与光学腔强耦合的离共振驱动多能级原子玻色-爱因斯坦凝聚体中观察到了腔介导的自旋相关相互作用。通过施加可调极化的驱动场，我们确定了原子极化率张量的标量和矢量分量在单组分和多组分凝聚体中的作用。在矢量耦合的临界强度之后，我们从腔输出场的分析推断出在两个内部态的凝聚体中形成了自旋织构。我们的工作为全局动力学规范场和自洽自旋轨道耦合气体提供了新的视角。
