PIRSA:23050024

Video URL

https://pirsa.org/23050024

Fermi Surface Anomaly and Symmetric Mass Generation

You, Y. (2023). Fermi Surface Anomaly and Symmetric Mass Generation. Perimeter Institute for Theoretical Physics. https://pirsa.org/23050024

You, Yi-Zhuang. Fermi Surface Anomaly and Symmetric Mass Generation. Perimeter Institute for Theoretical Physics, May. 18, 2023, https://pirsa.org/23050024 

          @misc{ scivideos_PIRSA:23050024,
            doi = {10.48660/23050024},
            url = {https://pirsa.org/23050024},
            author = {You, Yi-Zhuang},
            keywords = {Quantum Matter},
            language = {en},
            title = {Fermi Surface Anomaly and Symmetric Mass Generation},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2023},
            month = {may},
            note = {PIRSA:23050024 see, \url{https://scivideos.org/index.php/pirsa/23050024}}
          }

Yi-Zhuang You University of California, San Diego

Talk numberPIRSA:23050024
DOI10.48660/23050024
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

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.

Zoom link: https://pitp.zoom.us/j/97223165997?pwd=SkhJZEt1ejhQRm0yK2tKS3NhM2o2Zz09