Physics

In this first group meeting of the academic year, we will all introduce ourselves and give a short description of our current research.

The plan for future group meetings is for members, visitors and faculty to give a pedagogical introductory talk on...

Abstract: In quantum information theory (QIT), arguments often rely — sometimes implicitly — on the assumption that a given process can be repeated identically and independently many times. However, establishing the stochastic independence of...

Abstract: It was conjectured that a holographic CFT deformed by the TTbar operator is dual to a bulk with a finite radial cutoff. I will describe a sequence of deformations that appear to push the cutoff surface into the black hole interior. The...

Abstract: Scattering amplitudes can be used to probe the all-orders structure of gauge theories. Particularly rich is the non-planar sector, where physical phenomena such as quadrupole radiation and multi-reggeon interactions appear. In this talk I...

Abstract: I will discuss two methods for diagnosing ’t Hooft anomalies of internal symmetries in 2+1d lattice systems. Anomalous symmetries of this kind arise naturally at the boundary of 3+1D symmetry-protected topological phases, and are known to...

Abstract: Is it possible to read off the quantum gravity dual of a CFT directly from its operator algebra? In this talk, I will present a step-by-step recipe for building up 3D quantum spacetimes dual to 2D CFTs, synthesizing results and techniques...

Abstract: In this talk, we'll review the bootstrap method that uses unitarity and causality (analyticity + crossing) to constrain low-energy effective field theories (EFTs), especially those including gravitational couplings. This method allows us...

Abstract: We study the operator algebra of extended conformal defects in more than two spacetime dimensions. Such algebra structure encodes the combined effect of multiple impurities on physical observables at long distances as well as the...