Physics

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...

Abstract: In gauge theories with fundamental matter, such as QCD, there is typically no sharp way to distinguish confining and Higgs regimes because there are no suitable order parameters.  It is standard lore that these two regimes are continuously...

Abstract: In the original CPT theorem one is restricted to flat space and is unable to make converse statements. In this talk I will show how we can reformulate the CPT theorem using a symmetry argument and generalise it to beyond flat space. This...

Abstract: Understanding how to characterize quantum chaotic dynamics is a longstanding question.

In this colloquium, I will discuss recent developments that identify Free Probability --  a generalization of probability theory to non-commuting objects...

Abstract: Current gravitational-wave detectors are being upgraded, and plans are developing for future detectors with greater sensitivity over broader frequency bands.  As instruments improve and develop, more cycles of sources’ gravitational...

Abstract: I will discuss ongoing work on understanding the algebra of gravitationally-dressed observables and generalized entropy in generic spacetimes. Special attention will be paid to spacetimes that underwent an inflationary era in the far past...

Abstract: I will describe the one-loop partition function for strings propagating on AdS3 geometries with NS-NS flux (for generic values of AdS radius in string units). The essential ingredients that go into this analysis have been known for a while...