Physics

Noether's theorem is textbook material in quantum field theory, but among experts it has been known for a while that there are quantum field theories with continuous global symmetries which possess no conserved current. In this talk I will give a...

Inspired by a recent computation of holographic entanglement entropy in flat space holography, we proposed a covariant prescription to compute holographic entanglement entropy and Poincare blocks (Global BMS blocks) in the context of three...

Interacting unitary conformal fixed points in five dimensions are mysterious objects which often do not have weakly coupled UV descriptions. Their conformal data such as operator spectrum and correlation functions appear more elusive to conventional...

Quantum field theories with a large number of fields offer a number of simplifications, and in some cases allow for computations at strong coupling. Two canonical examples are field theories where the fundamental fields are vectors, such as the O(N)...

I discuss the partition functions of supersymmetric gauge theories on Seifert manifolds. First we consider the case of 3d N=2 theories on a three-manifold $M_{g,p}$, a degree-p principal U(1) bundle over a smooth, genus-g Riemann surface. This...

Many quantities in the AdS/CFT correspondence, for example entanglement entropies, are defined up to a choice of UV cutoff. The cutoff can be chosen and adjusted depending on one's purposes; it represents a sort of gauge freedom. I will explain that...

Properties of CFT operators carrying some large global charge can be systematically computed in a 1/Q expansion by assuming that the corresponding states on the cylinderare described by a supefluid phase. In particular one can compute the spectrum...

After a brief review (suitable for physicists) of computational genomics and complex traits, I describe recent progress in this area.Using methods from Compressed Sensing (L1-penalized regression; Donoho-Tanner phase transition with noise) and the...

We study the Eigenstate Thermalization Hypothesis (ETH) in chaotic conformal field theories (CFTs) of arbitrary dimensions. Assuming local ETH, we compute the reduced density matrix of a ball-shaped subsystem of finite size in the infinite volume...

There seem to be no good examples of UV complete theories that have low-lying massive higher spin states isolated by a large gap, despite the relative ease of constructing effective field theories describing such states. We discuss constraints from...