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X-FROM-URL:https://eom.sdu.dk/events/ical/7a9e830f-f9e7-4d9c-b0c3-e7d9cdb6
 fc93
X-WR-CALNAME:QM Research Seminar: When do anomalous finite symmetries in (
 3+1)d enforce gaplessness?
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TZID:Europe/Copenhagen
X-LIC-LOCATION:Europe/Copenhagen
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DTSTAMP:20260907T204659Z
DTSTART:20261028T030000
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DTSTAMP:20260907T204659Z
DTSTART:20260325T020000
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DESCRIPTION:[b]Speaker: Matthew Yu [/b](University of Oxford)\n\n[b]Abstra
 ct: [/b]\nI will explain a comprehensive framework for characterizing the
  infrared (IR) phases of a fermionic QFTs in (3+1)d\, based on their quan
 tum anomalies associated with a finite symmetry. We uncover a fundamental
  dichotomy among these anomalies: the first class of anomalies can always
  be realized by symmetric gapped states\, while the second class can neve
 r be realized by gapped states without breaking the given symmetry\, esta
 blishing the phenomenon of symmetry-enforced gaplessness in these setting
 s. Using the construction of symmetry extension afforded to us by new dev
 elopments in fusion 2-categories\, we construct the candidate gapped stat
 es that theories with the first class of anomalies can flow to in the IR.
  As an application\, I will provide examples of concrete predictions for 
 the candidate IR phases of (3+1)d gauge theories based on our results.
DTEND:20260420T140000Z
DTSTAMP:20260907T204659Z
DTSTART:20260420T130000Z
LOCATION:Syddansk Universitet\, Campusvej 55\, 5230\, Odense M
SEQUENCE:0
SUMMARY:QM Research Seminar: When do anomalous finite symmetries in (3+1)d
  enforce gaplessness?
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