Singular monopoles and supersymmetric gauge theories in three dimensions

Sergey A. Cherkis, Anton Kapustin

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


According to the proposal of Hanany and Witten, Coulomb branches of N = 4 SU(n) gauge theories in three dimensions are isometric to moduli spaces of BPS monopoles. We generalize this proposal to gauge theories with matter, which allows us to describe the metrics on their spaces of vacua by means of the hyper-Kähler quotient construction. To check the identification of moduli spaces a comparison is made with field theory predictions. For SU(2) theory with k fundamental hypermultiplets the Coulomb branch is expected to be the Dk ALF gravitational instanton, so our results lead to a construction of such spaces. In the special case of SU(2) theory with four or fewer fundamental hypermultiplets we calculate the complex structures on the moduli spaces and compare them with field-theoretical results. We also discuss some puzzles with brane realizations of three-dimensional N = 4 theories.

Original languageEnglish (US)
Pages (from-to)215-234
Number of pages20
JournalNuclear Physics B
Issue number1-2
StatePublished - Aug 10 1998


  • Bps monopoles
  • Gauge theories
  • Supersymmetry

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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