Topological invariants and edge modes at quantum criticality
ORAL
Abstract
It is sometimes presumed that a finite correlation length is essential to stabilizing topological phenomena. This applies even to well-studied topological semi-metals, where one appeals to gapped degrees of freedom (in momentum-space). In this talk, I will show that this common wisdom is not justified: topological invariants and edge modes can survive at phase transitions. This leads to the novel notion of symmetry-enriched quantum criticality, examples of which are hiding in plain sight.
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Presenters
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Ruben Verresen
Department of Physics, Harvard university, Harvard University, Department of Physics, Technical University of Munich
Authors
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Ruben Verresen
Department of Physics, Harvard university, Harvard University, Department of Physics, Technical University of Munich
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Ryan Thorngren
Harvard CMSA
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Nick G. Jones
University of Bristol
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Frank Pollmann
Physics, Technische Universitat Munchen, TU Munich, Technical University of Munich, Department of Physics, Technical University of Munich, Tech Univ Muenchen, Department of Physics, T42, Technical University of Munich, D-85748 Garching, Germany
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Ashvin Vishwanath
Harvard University, Physics, Harvard University, Department of Physics, Harvard University