报告人：尤亦庄，助理教授 (University of California, Sandiego, USA)

时 间：2023年07月20日(周四) 上午 10:00-12:00

地 点：博盈彩票良乡校区 物理实验中心229

摘要：

Fermi liquids are gapless quantum many-body states of fermions, which describes electrons in the normal state of most metals at low temperature. Despite its long history of study, there has been renewed interest in understanding the stability of Fermi liquid from the perspectives of emergent symmetry and quantum anomaly. In this talk, I will introduce the concept of Fermi surface anomaly and propose a possible scheme to classify it. The classification scheme is based on viewing the Fermi surface as the boundary of a Chern insulator in the phase space, with an unusual dimension counting arising from the non-commutative phase space geometry. This enables us to extend the notion of Fermi surface anomaly to the non-perturbative cases and discuss symmetric mass generation on the Fermi surface when the anomaly is canceled. I will provide examples of lattice models that demonstrate Fermi surface symmetric mass generation and make connections to the recent progress in understanding the pseudo-gap transition in cuprate materials.

简历：

尤亦庄是美国加州大学圣迭戈分校的助理教授。博士毕业于清华大学高等研究院。之后曾先后于美国加州大学圣芭芭拉分校和哈佛大学从事博士后研究。目前的主要研究兴趣包括量子多体物理、量子信息、机器学习等。

联系方式：yangfan_blg@bit.edu.cn

邀请人： 杨帆

网 址：http:/

承办单位：物理学院、先进光电量子结构设计与测量教育部重点实验室