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arXiv · 1803.03387

Spin exchange-induced spin-orbit coupling in a superuid mixture

Li Chen·Chuanzhou Zhu·Yunbo Zhang·Han Pu
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Abstract

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.

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Li Chen, Chuanzhou Zhu, Yunbo Zhang, Han Pu. 2018-03-09. Spin exchange-induced spin-orbit coupling in a superuid mixture. https://doi.org/10.1103/physreva.97.031601

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