String Theory seminar - Eric Perlmutter [NOTE UNUSUAL TIME: 15:00] Seminar

Abstract: I will explain how the spectra of 2D CFTs, both rational and irrational, exhibit surprising rigidity and determinacy. These structures follow from new ways of leveraging discreteness, integrality and modularity constraints on torus observables, via technology from the world of modular forms. Our techniques suggest alternative bootstrap approaches to the space of 2D CFTs.