Semiclassical framed BPS states

Gregory W. Moore, Andrew B. Royston, Dieter Van den Bleeken

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Abstract: We provide a semiclassical description of framed BPS states in four-dimensional N= 2 super Yang-Mills theories probed by ’t Hooft defects, in terms of a supersymmetric quantum mechanics on the moduli space of singular monopoles. Framed BPS states, like their ordinary counterparts in the theory without defects, are associated with the L2 kernel of certain Dirac operators on moduli space, or equivalently with the L2 cohomology of related Dolbeault operators. The Dirac/Dolbeault operators depend on two Cartan-valued Higgs vevs. We conjecture a map between these vevs and the Seiberg-Witten special coordinates, consistent with a one-loop analysis and checked in examples. The map incorporates all perturbative and nonperturbative corrections that are relevant for the semiclassical construction of BPS states, over a suitably defined weak coupling regime of the Coulomb branch. We use this map to translate wall crossing formulae and the no-exotics theorem to statements about the Dirac/Dolbeault operators. The no-exotics theorem, concerning the absence of nontrivial SU(2)R representations in the BPS spectrum, implies that the kernel of the Dirac operator is chiral, and further translates into a statement that all L2 cohomology of the Dolbeault operator is concentrated in the middle degree. Wall crossing formulae lead to detailed predictions for where the Dirac operators fail to be Fredholm and how their kernels jump. We explore these predictions in nontrivial examples. This paper explains the background and arguments behind the results announced in the short note [1].

Original languageEnglish (US)
Article number71
JournalJournal of High Energy Physics
Volume2016
Issue number7
DOIs
StatePublished - Jul 1 2016

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operators
homology
theorems
defects
Yang-Mills theory
predictions
monopoles
quantum mechanics

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Moore, Gregory W. ; Royston, Andrew B. ; Van den Bleeken, Dieter. / Semiclassical framed BPS states. In: Journal of High Energy Physics. 2016 ; Vol. 2016, No. 7.
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Semiclassical framed BPS states. / Moore, Gregory W.; Royston, Andrew B.; Van den Bleeken, Dieter.

In: Journal of High Energy Physics, Vol. 2016, No. 7, 71, 01.07.2016.

Research output: Contribution to journalArticle

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