In this talk, we will study a gauge-theoretic construction of (branched) complex projective structures on a closed Riemann surface X of genus g>1. This construction underlies the celebrated conformal limit of Gaiotto and provides a preliminary understanding of its geometry.  More concretely, the non-abelian Hodge correspondence maps a polystabl SL(2,R)-Higgs bundle on X to a connection which, in some cases, is the holonomy of a branched hyperbolic structure. (This happens for example in the Hitchin component.) On the other hand, Gaiotto’s conformal limit then maps the same bundle to a partial oper, i.e., to a connection whose holonomy is that of a branched complex projective structure compatible with X.We will see how these are both instances of the same phenomenon, i.e. that the family of connections appearing in the conformal limit can be understood as a family of complex projective structures, deforming the hyperbolic ones into the ones compatible with X. For zero Toledo invariant, this deformation turns out to be optimal, inducing a geodesic on Teichmüller’s space. This is joint work with Peter B. Gothen.

 

Date and Venue

Start Date
Venue
FC1 .029
End Date

Speaker

Pedro M. Silva

Speaker's Institution

Centro de Matemática da Universidade do Porto

Files

Area

Geometry and Topology