学术报告:Topological superradiant phase in a degenerate Fermi gas

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报告题目:Topological superradiant phase in a degenerate Fermi gas

报告时间:4月8日(周五)下午3:30

报告地点:物理楼新楼五楼多功能厅

报告人: 张威教授(中国人民大学)

报告摘要:

We predict the existence of a topological superradiant state in a two-component degenerate Fermi gas in a cavity. The superradiant light generation in the transversely driven cavity mode induces a cavity-assisted spin-orbit coupling in the system and opens a bulk gap at half-filling. This mechanism can simultaneously drive a topological phase transition in the system, yielding a topological superradiant phase. We map out the steady-state phase diagram of the system in the presence of an effective Zeeman field, and identify a critical quadracritical point beyond which the topological and the conventional superraidiant phase boundaries separate. We also propose to detect the topological phase transitions based on the unique signatures in the momentum-space density distribution.

报告人简历:

张威,中国人民大学物理系教授。本科毕业于北京大学物理系,2006年博士毕业于佐治亚理工学院,随后在密歇根大学进行博士后工作。2008年回国,在中国人民大学先后任副教授、研究员、教授。主要从事超冷原子物理、超导物理、磁性物理方面的理论研究,目前共发表论文40余篇,出版学术专著2部,有多篇论文在《物理评论快报》、《自然通讯》、《物理学进展》等期刊发表。先后入选新世纪优秀人才、北京市科技新星等人才计划,2015年获宝钢优秀教师奖。

邀请人:张文献教授


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