Statut | Confirmé |
Série | STR-LPT-ENS-HE |
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 | |
Commentaires | |
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