21–23 Oct 2019
Turin
Europe/Rome timezone

Defects, nested instantons and comet shaped quivers

23 Oct 2019, 09:35
35m
Aula Magna del Rettorato (Turin)

Aula Magna del Rettorato

Turin

Aula Magna del Rettorato, Via Verdi, 8 - 10124 Torino

Speaker

Nadir Fasola (Istituto Nazionale di Fisica Nucleare)

Description

We study the effective SUSY theory of a surface defect describing the parabolic reduction of gauge connections at punctures on Riemann surfaces, which gives rise to a quiver GLSM. We will show how the partition function of such a theory naturally computes certain virtual invariants of the moduli spaces of stable representations of the quiver and how these results relate to a conjecture of Hausel, Letellier and Rodriguez-Villegas about the cohomology of character varieties.

Primary author

Nadir Fasola (Istituto Nazionale di Fisica Nucleare)

Co-authors

Giulio Bonelli (TS) Alessandro Tanzini (Istituto Nazionale di Fisica Nucleare)

Presentation materials