Speaker
Chihiro Matsui
(The University of Tokyo)
Description
Recent progress in statistical physics has revealed the emergence of nonthermal phenomena in otherwise ergodic systems. Quantum many-body scars (QMBS) are known to be one of the central ingredients underlying such atypical behaviors.
QMBS often appear as special eigenstates of ergodic quantum systems, forming a small but nontrivial invariant subspace. In this talk, we discuss the mathematical structure that stabilizes such subspaces under dynamics. At the same time, we demonstrate that the scar subspace can inherit properties of the underlying ground state, with particular emphasis on symmetry-associated topological properties.
This talk is based on recent joint work (arXiv:2512.11216).