PIRSA:21040009

Video URL

https://pirsa.org/21040009

Subsystem-Symmetry protected phases of matter

Burnell, F. (2021). Subsystem-Symmetry protected phases of matter. Perimeter Institute for Theoretical Physics. https://pirsa.org/21040009

Burnell, Fiona. Subsystem-Symmetry protected phases of matter. Perimeter Institute for Theoretical Physics, Apr. 05, 2021, https://pirsa.org/21040009 

          @misc{ scivideos_PIRSA:21040009,
            doi = {10.48660/21040009},
            url = {https://pirsa.org/21040009},
            author = {Burnell, Fiona},
            keywords = {Quantum Matter},
            language = {en},
            title = {Subsystem-Symmetry protected phases of matter},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2021},
            month = {apr},
            note = {PIRSA:21040009 see, \url{https://scivideos.org/pirsa/21040009}}
          }

Fiona Burnell University of Minnesota

Talk numberPIRSA:21040009
DOI10.48660/21040009
Source RepositoryPIRSA
Talk Type Scientific Series
Subject

Abstract

We know that different systems with the same unbroken global symmetry can nevertheless be in distinct phases of matter.  These different "symmetry-protected topological" phases are characterized by protected (gapless) surface states.  After reviewing this physics in interacting systems with global symmetries, I will describe how a different class of symmetries known as subsystem symmetries, which are neither local nor global, can also lead to protected gapless boundaries.  I will discuss how some of these subsystem-symmetry protected phases are related (though not equivalent) to interacting higher-order topological insulators, with protected gapless modes along corners or hinges in higher dimensional systems.