Physics

Abstract: Recently it has been shown that black holes decohere quantum superpositions in their exterior, and suggested that this may be of fundamental importance for their quantum description [arXiv:2205.06279, arXiv:2301.00026, arXiv:2311.11461]. ...

Abstract: Pulsar timing arrays (PTAs) consist of a set of regularly monitored millisecond pulsars with extremely stable rotational periods. The arrival time of pulses can be altered by the passage of gravitational waves (GWs) between them and the...

Abstract: Stellar streams, the tidal remnants of globular clusters and dwarf galaxies orbiting throughout the Milky Way’s halo, are some of the most powerful tools in the study of near-field cosmology. In particular, they are sensitive probes of the...

Abstract: In this talk, I will review a simple derivation of an integral kernel formula for the partition function of T Tbar deformed CFT based on the holographic single trace T Tbar deformation and its generalization to J Tbar and J Jbar...

Abstract: The gravitational perturbations of a rotating Kerr black hole are notoriously complicated, even at the linear level. In 1973, Teukolsky showed that their physical degrees of freedom are encoded in two gauge-invariant Weyl curvature scalars...

Abstract: Holographic tensor networks model AdS/CFT, but so far they have been limited by involving only systems that are very different from gravity. Unfortunately, we cannot straightforwardly discretize gravity to incorporate it, because that...

Abstract: A perturbed black hole rings down by producing radiation at certain fixed (complex) frequencies - the quasinormal frequencies. These frequencies can be identified with the spectrum of a non-self adjoint operator derived from the evolution...

Abstract: Driven systems can exhibit new behaviors beyond what is possible in equilibrium. We focus on non-dissipative dynamics of free fermions in disordered systems, starting with one-dimensional drives with chiral symmetry. Eigenstates of...