Geometry and analysis in nonlinear sigma models

D. Auckly, L. Kapitanski, J. M. Speight

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The configuration space of a nonlinear sigma model is the space of maps from one manifold to another. This paper reviews the authors’ work on nonlinear sigma models with target a homogeneous space. It begins with a description of the components, fundamental group, and cohomology of such configuration spaces, together with the physical interpretations of these results. The topological arguments given generalize to Sobolev maps. The advantages of representing homogeneousspace- valued maps by flat connections are described, with applications to the homotopy theory of Sobolev maps, and minimization problems for the Skyrme and Faddeev functionals. The paper concludes with some speculation about the possibility of using these techniques to define new invariants of manifolds.

Original languageEnglish (US)
Pages (from-to)19
Number of pages1
JournalSt. Petersburg Mathematical Journal
Issue number1
StatePublished - 2007


  • Faddeev model
  • Skyrme model
  • Yang–Mills equations

ASJC Scopus subject areas

  • Analysis
  • Algebra and Number Theory
  • Applied Mathematics


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