Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Mardi 5 Juin 2018
Heure 11:30
Institut LPTENS
Salle LPTENS library
Nom de l'orateur Longhi
Prenom de l'orateur Pietro
Addresse email de l'orateur
Institution de l'orateur Uppsala
Titre BPS Graphs of Class S Theories
Résumé BPS quivers and Spectral Networks are two powerful tools for computing BPS spectra in 4d N=2 theories. On the Coulomb branches of these theories, the BPS spectrum is well-defined only away from walls of marginal stability, where wall-crossing phenomena take place. Surprisingly, while BPS spectra are ill-defined, there is a lot of information hidden in spectral networks at maximal intersections of MS walls. In this talk I will describe how they give rise to BPS graphs, and how the relation of the latter to BPS quivers emerges naturally. I will also present a novel construction of the wall-crossing invariant of Kontsevich and Soibelman, a.k.a the BPS monodromy, based entirely on topological data of BPS graphs, and derived by wall-crossing in presence of surface defects.
Numéro de preprint arXiv
Fichiers attachés
  • Longhi_Paris-2018.pdf (1725071 bytes) OPEN

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