Physics

In 1975 Hawking showed that the evaporation of black holes creates a problem for unitarity. This argument can be made rigorous through the small corrections theorem, and implies that there must be a fundamental change in our picture of semiclassical...

We revisit the problem of baryons in the large N limit of Quantum Chromodynamics. A special case in which the theory of Skyrmions is inapplicable is one-flavor QCD, where there are no light pions to construct the baryon from. More generally, the...

I will give a review of recent progress in studying 6D SYM and supergravity amplitudes. Based on the spinor-helicity formalism of Cheung and O'Connell, recent work has shown that superamplitudes in 6D have a simple and compact form, not unlike 4D...

Beem et al. used a superconformal supercharge to localize N=4 Yang-Mills to a two-dimensional chiral theory. I will discuss my work with Gaiotto, in which we analyze the holographic dual of this localization. We argue that the same localization...

Every (2+1) dimensional lattice model with an energy gap is believed to be described by a topological quantum field theory (TQFT) in the low energy, long wavelength limit. What this means concretely is that every lattice model of this kind is...

In this talk I discuss Hamiltonian truncation, a toolkit to construct quantum field theories. Hamiltonian truncation is in many ways orthogonal to the more familiar lattice regularization, and it can be used to systematically compute QFT observables...

Many experiments point to a significant transformation in the electronic state of the cuprate superconductors as their density is varied at very low temperature. The critical density is close to the “optimal” density where the superconductivity is...

I will go over the new proof of the quantum null energy condition (QNEC):https://arxiv.org/abs/1812.04683The proof uses tools and techniques from the modular theory. In particular, see Section 2.4 theorem B of Borchers notes:https://www.mat.univie...

Operators with non-integer spin have been considered in the literature in various forms and contexts, and have been suggested to control the Regge limit and the OPE of average null energy operators. I will discuss the idea of formally introducing...

Compact Lie Algebras su(N) have aspects of their representations conveniently expressed in terms of matrices, but they also have some aspect that are most conveniently described by terms of graphical means, i.e. weight spaces, root space, Dynkin...