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X-FROM-URL:https://eom.sdu.dk/events/ical/73dd4d78-c6dc-423c-b67e-15232941
 3a23
X-WR-CALNAME:Disordered Phases of Matter with Non-Abelian Symmetries: Inst
 abilities and Enlargements
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TZID:Europe/Copenhagen
X-LIC-LOCATION:Europe/Copenhagen
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DTSTAMP:20261112T113844Z
DTSTART:20261028T030000
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DESCRIPTION:[b]Speaker:​ Ludwig Zweng [/b](Technische Universität München)
 \n\nRecent works have developed a unifying framework for classifying grou
 nd state phases of matter with a wide range of discrete symmetries—both g
 roup-like and non-invertible symmetries—via a holographic correspondence 
 between symmetric operators in d dimensions and topological operators in 
 a d+1 dimensional system often known as the SymTO or SymTFT. Its lattice 
 formulation naturally yields fixed-point commuting Hamiltonians that real
 ize these phases in their ground state. In this work\, we extend this fra
 mework to disordered and non-equilibrium settings by analyzing excited st
 ates of the disordered versions of these fixed-point models with non-Abel
 ian group symmetries. Characterizing symmetry breaking patterns in the ex
 cited states requires new tools and diagnostic methods\, which we develop
  in the language of bond algebras and their commutants\, and which resolv
 e whether the non-commutativity obstructing eigenstate order is local or 
 merely global. We find that the disordered phase structure can differ dra
 matically from its clean ground state counterpart: distinct clean ground 
 state phases may merge\, a single one may split\, and orders with no grou
 nd state analogue can appear. We illustrate these phenomena by constructi
 ng lattice models for S₃\, D₈\, and S₄\, classifying the distinct excited
  state phases in each case\, and showing that the answer depends on the l
 ocal Hilbert space and not on the symmetry group alone. Finally\, we argu
 e that the SymTFTs that capture ground state phases do not fully capture 
 the intricacies of the excited states.
DTEND:20260916T130000Z
DTSTAMP:20261112T113844Z
DTSTART:20260916T120000Z
LOCATION:Syddansk Universitet\, Campusvej 55\, 5230\, Odense M
SEQUENCE:0
SUMMARY:Disordered Phases of Matter with Non-Abelian Symmetries: Instabili
 ties and Enlargements
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