(University of Ghent)

摘要:
The Lieb-Schultz-Mattis theorem is a powerful principle for quantummany-body systems. In this talk, I will discuss 1d LSM theorem in the presence of an exotic antiunitary translation or inversion symmetry involving time reversal.  This explains the gaplessness of a class of chiral spin models not indicated by the Lieb-Schultz-Mattis (LSM) theorem and its known extensions. Moreover, I will present symmetry classes with minimal sets of magnetic space group generators that give nontrivial LSM-type constraints. These extended LSM theorems apply to systems with a broader class of spin interactions, such as Dzyaloshinskii-Moriya interactions and triple-product interactions.

报告人简介:
Linhao Li received his B.S. form Shanghai Jiao Tong University under the supervision of Prof. Zi Cai in 2018 and his Ph.D. from University of Tokyo under the supervision of Prof. Masaki Oshikawa in 2023 fall. Now he is moving to the University of Ghent, as a postdoc collaborating with Prof. Frank Verstraete. His main interest is on the topological phase of matter and nonperturbative method in quantum many-body systems, especially Lieb-Schultz-Mattis type theorem in condensed matter and symmetry-protected criticality.

联系人: 万源 (9403)