Abstract: Symmetries play a crucial role in
both quantum field theory and quantum many-body systems on the
lattice. One key topological feature that a global symmetry can
have is a "('t Hooft) anomaly". But how exactly should an anomaly
be defined...
Abstract: I will review non-geometric
string constructions, focusing on asymmetric orbifolds and in
particular quasicrystalline orbifolds, which freeze moduli and
yield isolated vacua (“string islands”). In the supersymmetric case
(N=8,16), these...
Abstract: Black hole perturbation theory
captures a few important effects in the dynamics of binary mergers,
such as tidal deformations and the decay of ringdown modes. It also
describes the physics of the photon ring. However,
extracting...
Abstract: This will be the first amplitudes
meeting of the year. There is no scheduled talk; instead, we will
use this session to outline topics of interest for the group and to
discuss recent papers.
