Events Archive

It has been recently recognized that the same type of melonic large N structure governs SYK models and tensor models alike. Following Witten and Klebanov-Tarnopolsky, this has led to the introduction of new SYK-like tensor models, which reproduce key features of SYK models in the familiar context of large N field theories.

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 methods than in lower dimensions.

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 includes the topological index and the three-sphere and lens space partition functions as special...

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 of such “heavy" operators and the heavy-heavy-light fusion coefficients.

It is commonly believed that quantum information is not lost in a black hole. Instead, it is encoded into non-local degrees of freedom in some clever way; like a quantum error-correcting code. In this talk, I will present two decoding procedures for reconstructing a quantum state from the Hawking radiation in the Hayden-Preskill thought...

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 limit when the full system is an energy eigenstate.

I will review recent developments in the understanding of Lorentzian correlators in generic CFTs. I will then discuss two applications of these developments. The first one involves bounds on the OPE coefficients on the leading Regge trajectory. In theories with gravity duals, it constrains certain higher-derivative corrections to the Einstein ...

We discuss how to obtain dynamics of semiclassical gravity in 3d AdS from the large central charge limit of irreducible representations of the conformal algebra of 2d CFTs, with a focus on black hole information loss and bulk reconstruction.

I will explain how conformally-covariant differential operators arise from finite-dimensional representations of the (global) conformal group.