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Single-vortex state of a Bose-Fermi mixture

创建于2019年04月10日 星期三作者 : 科研办 浏览量 :

主讲人:潘建松,上海交通大学博士后

  间:20194129:00

  点:物电学院A219

联系人:李福祥

 

 

讲座摘要:Inspired by recent experiments, we theoretically study the single-vortex state of a Bose-Fermi mixture. As the density ratio between the boson and the fermion components is tuned, we identify a transition in the vortex-core structure, across which fermions in the vortex core become completely depleted even in the weak-coupling Bardeen-Cooper-Schrieffer regime. This is accompanied by changes in key properties of the vortex state, as well as by the localization of the Bose-Einstein condensate in the vortex core. In presence of p-wave Fermi-Fermi interaction, this gives rise to a dynamically driven local interface that emerges between fermions and bosons, along which chiral Majorana edge states should appear. We examine in detail the variation of vortex-core structures as well as the formation of chiral Majorana edge states with increasing bosonic density, where the circulation of the vortex plays an important role. In particular, we find the Majorana zero mode in the vortex core becomes isolated by tuning the Bose density when the vortex circulation mismatches the chirality of the p-wave interaction. Our study may provide a paradigm for the dynamical control of vortex.

 

主讲人简介:潘建松,上海交通大学博士后。2012年中国科技大学近代物理系本科毕业,2017年获中国科学技术大学博士学位。 2017年进入上海交通大学维尔切克量子中心开展博士后研究,并入选博士后创新人才支持计划。主要研究兴趣为超冷原子气体中的新奇量子态,包括FFLO超流态、对称保护拓扑态和时间晶体态等。