We demonstrate coupling between the atomic spin- and orbital-angular momentum (OAM) of the atom’s center-of-mass motion in a Bose-Einstein condensate (BEC). The coupling is induced by Raman-dressing lasers with a Laguerre-Gaussian beam and creates coreless vortices in an

spinor BEC. We observe correlations between spin and OAM in the dressed state and characterize the spin texture; the result is in good agreement with the theory. In the presence of the Raman field, our dressed state is stable for 0.1 s or longer, and it decays due to collision-induced relaxation. As we turn off the Raman beams, the vortex cores in the bare spin

and

split. These spin-OAM coupled systems with the Raman-dressing approach have great potential for exploring new topological textures and quantum states.

我们展示了玻色-爱因斯坦凝聚物（BEC）中原子质心运动的原子自旋和轨道角动量（OAM）之间的耦合。耦合是由拉曼梳妆激光与拉盖尔-高斯光束引起的，并在无源涡流中产生无核涡旋。

转子BEC。我们观察了穿戴状态下自旋和OAM之间的相关性，并表征了自旋纹理。结果与理论相吻合。在拉曼场的存在下，我们的穿戴状态稳定了0.1 s或更长时间，并且由于碰撞引起的松弛而衰减。当我们关闭拉曼光束时，光旋中的涡旋核心

和

分裂。这些具有拉曼修整方法的自旋OAM耦合系统具有探索新的拓扑纹理和量子态的巨大潜力。