Video Lectures

Edge excitations of (2+1)D topological phases are usually described using continuum field theories. But the boundaries of some (2+1)D topological phases can also be described using lattice-like edge theories that have a finite dimensional Hilbert...

 q-deformed Virasoro and W-algebras were defined a quarter century ago with the aim of furthering our understanding of two-dimensional integrable and conformal field theories, while also developing the representation theory of so-called quantum...

Understanding of the role magnetic field in astrophysical environments is essential for many brunches of astrophysical research. The knowledge of magnetic field and polarized radiation that this field induces is important for the ongoing search for...

We study the Lyapunov exponent in disordered quantum field theories. Generically the Lyapunov exponent can only be computed in isolated CFTs, and little is known about the way in which chaos grows as we deform the theory away from weak coupling. In...

In this talk I will discuss two undetected populations of black holes. In the faraway Universe, the first lensed z > 6 quasar (J0439+1634) was recently discovered. We predicted that the observed population of quasars should contain many mildly...

I'll describe a method for analyzing the first-order theory of an arithmetic group using its congruence quotients. When this method works, it gives a strong form of first-order rigidity together with a complete description of the collection of...