Spin-exchange-induced spin-orbit coupling in a superfluid mixture
Spin-exchange-induced spin-orbit coupling in a superfluid mixture
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超流体混合物中自旋交换引起的自旋轨道耦合
DOI：
10.1103/physreva.97.031601
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发表时间：
2018
影响因子：
2.9
通讯作者：
浦晗
中科院分区：
文献类型：
--
作者：
陈立;朱川州;张云波;浦晗
本文研究了自旋为1/2的双粒子玻色-爱因斯坦凝聚体的基态性质。其中一种物质受到一对诱导自旋轨道（SO）耦合的拉曼激光束的照射，而另一种物质不与拉曼激光耦合。在一定范围内，可以得到分析结果。它清楚地表明，通过物种间的自旋交换相互作用，第二物种也表现出SO耦合。该混合物系统显示出非常丰富的相图，其中许多相不存在于SO耦合的单组分冷凝物中。我们的工作提供了一种在原子量子气体中产生SO耦合的新方法，为SO耦合超流混合物的研究开辟了一条新的途径。从实践的角度来看，自旋交换诱导的SO耦合可以克服某些原子物种在受到拉曼光束时的加热问题。
We investigate the ground-state properties of a dual-species spin-1/2 Bose-Einstein condensate. One of the species is subjected to a pair of Raman laser beams that induces spin-orbit (SO) coupling, whereas the other species is not coupled to the Raman laser. In certain limits, analytical results can be obtained. It is clearly shown that, through the inter-species spin-exchange interaction, the second species also exhibits SO coupling. This mixture system displays a very rich phase diagram, with many of the phases not present in an SO coupled single-species condensate. Our work provides a new way of creating SO coupling in atomic quantum gases, and opens up a new avenue of research in SO coupled superfluid mixtures. From a practical point of view, the spin exchange-induced SO coupling may overcome the heating issue for certain atomic species when subjected to the Raman beams.