Symmetries and defects in three-dimensional topological field theory
2016 (English)In: String-Math 2014: Proceedings Symposia in Pure Mathematics Volume 96 / [ed] Vincent Bouchard, Charles Doran, Stefan Méndez-Diez, Callum Quigley, Providence: American Mathematical Society (AMS), 2016, 20- p.Chapter in book (Refereed)
Boundary conditions and defects of any codimension are natural parts of any quantum field theory. Surface defects in three-dimensionaltopological field theories of Turaev-Reshetikhin type have applications to two-dimensional conformal field theories, in solid state physics and in quantumcomputing. We explain an obstruction to the existence of surface defects thattakes values in a Witt group. We then turn to surface defects in Dijkgraaf-Witten theories and their construction in terms of relative bundles; this allowsone to exhibit Brauer-Picard groups as symmetry groups of three-dimensionaltopological field theories.
Place, publisher, year, edition, pages
Providence: American Mathematical Society (AMS), 2016. 20- p.
Research subject Physics
IdentifiersURN: urn:nbn:se:kau:diva-45610ISBN: 978-1-4704-1992-9 (print)OAI: oai:DiVA.org:kau-45610DiVA: diva2:957074
FunderSwedish Research Council, 621-2013-4207