Video Lectures

One of the best laboratories to study strong-field gravity is the inner 100s of kilometers around black holes and neutron stars in binary systems with low-mass stars like our Sun. The X-ray light curves of these systems show variability on...

Type IIB supergravity famously has a discrete duality group, which is an exact symmetry of the full type IIB string theory. This symmetry has potential quantum anomalies, which could render the theory inconsistent. In this talk I will describe how...

We construct vacua of string theory in which all moduli are stabilized and the magnitude of the cosmological constant is exponentially small.  The vacua are supersymmetric AdS_4 solutions in flux compactifications of type IIB string theory on...

Recent advances in large-scale structure (LSS) theory have opened up new avenues for probing fundamental physics with the cosmic web. Future galaxy surveys will soon map the Universe with unprecedented sub-percent precision. I will present tools...

We discuss the possible transition between string scale black holes and self gravitating fundamental strings. We find evidence for a smooth transition in the heterotic string case while in the type II case they cannot be connected as classical...

The Gaia mission and its data releases are driving a revolution in our understanding of the Milky Way and its constituents. In this talk, I will highlight a few of the results stemming from the analysis of the truly spectacular datasets produced so...

The operator product expansion of massless celestial primary operators of arbitrary spin is investigated.  Poincare symmetry is found to imply a set of recursion relations on the operator product expansion coefficients of the leading singular terms...