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Vortex-pair states in spin-orbit-coupled Bose-Einstein condensates with coherent coupling 被引量:1

Vortex-pair states in spin-orbit-coupled Bose-Einstein condensates with coherent coupling
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摘要 Three types of vortex-pair are identified in two-component Bose-Einstein condensates (BEC) of dif- ferent kinds of spin-orbit coupling. One type holds the two vortices in one component of the two- component condensates. Both the other two types hold a vortex in each component of the two- component condensates, and exhibit meron-pair textures that have either null or unit topological charge, respectively. The cores of the two vortices are connected by a string of the relative phase jump. These vortex pairs can be generated from a vortex-free wave packet by incorporating different non- Abelian gauge field into the BEC. When a Rabi coupling is introduced, the distance between the two cores is effectively controlled by the Rabi coupling strength and a transition of vortex configurations is observed. Three types of vortex-pair are identified in two-component Bose-Einstein condensates (BEC) of dif- ferent kinds of spin-orbit coupling. One type holds the two vortices in one component of the two- component condensates. Both the other two types hold a vortex in each component of the two- component condensates, and exhibit meron-pair textures that have either null or unit topological charge, respectively. The cores of the two vortices are connected by a string of the relative phase jump. These vortex pairs can be generated from a vortex-free wave packet by incorporating different non- Abelian gauge field into the BEC. When a Rabi coupling is introduced, the distance between the two cores is effectively controlled by the Rabi coupling strength and a transition of vortex configurations is observed.
出处 《Frontiers of physics》 SCIE CSCD 2018年第5期295-301,共7页 物理学前沿(英文版)
基金 This work was supported by the National Natural Science Foundation of China under Grant Nos. 11604193 and 11774034, and the Natural Science Foundation for Young Sci- entists of Shanxi Province, China (Grant No. 201601D202012).
关键词 Bose-Einstein condensates spin-orbit coupling vortex-pair states Bose-Einstein condensates spin-orbit coupling vortex-pair states
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