The Kapustin–Witten equations and nonabelian Hodge theory

Chih Chung Liu, Steven Rayan, Yuuji Tanaka

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)


Arising from a topological twist of N= 4 super Yang–Mills theory are the Kapustin–Witten equations, a family of gauge-theoretic equations on a four-manifold parametrised by t∈ P1. The parameter corresponds to a linear combination of two super charges in the twist. When t= 0 and the four-manifold is a compact Kähler surface, the equations become the Simpson equations, which was originally studied by Hitchin on a compact Riemann surface, as demonstrated independently in works of Nakajima and the third-named author. At the same time, there is a notion of λ-connection in the nonabelian Hodge theory of Donaldson–Corlette–Hitchin–Simpson in which λ is also valued in P1. Varying λ interpolates between the moduli space of semistable Higgs sheaves with vanishing Chern classes on a smooth projective variety (at λ= 0) and the moduli space of semisimple local systems on the same variety (at λ= 1) in the twistor space. In this article, we utilise the correspondence furnished by nonabelian Hodge theory to describe a relation between the moduli spaces of solutions to the equations by Kapustin and Witten at t= 0 and t∈R\{0} on a smooth, compact Kähler surface. We then provide supporting evidence for a more general form of this relation on a smooth, closed four-manifold by computing its expected dimension of the moduli space for each of t= 0 and t∈R\{0}.

頁(從 - 到)23-41
期刊European Journal of Mathematics
出版狀態Published - 2022 7月

All Science Journal Classification (ASJC) codes

  • 數學(全部)


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