Archive of IAS Friday High Energy Theory Seminars

Dec
13
2019

High Energy Theory Seminar

Topological Quantum Phases
Alexei Kitaev
1:45pm|Bloomberg Lecture Hall
I will discuss topological classification of gapped many-body Hamiltonians and their ground states in dimension d. In general, the problem is too hard as it includes diverse phenomena such as degenerate ground states on the torus, anyons, and...
Nov
15
2019

High Energy Theory Seminar

Deforming Holomorphic Chern-Simons at Large N
Si Li
1:45pm|Bloomberg Lecture Hall
We describe the coupling of holomorphic Chern-Simons theory at large N with Kodaira-Spencer gravity. This gives a complete description of open-closed string field theory in the topological B-model. We explain an anomaly cancellation mechanism at all...
Nov
01
2019

High Energy Theory Seminar

High-Energy Conformal Bootstrap and Tauberian Theory
Baurzhan Mukhametzhanov
1:45pm|Bloomberg Lecture Hall
We analyze modular invariance drawing inspiration from tauberian
theorems. Given a modular invariant partition function with a positive
spectral density, we derive lower and upper bounds on the number of
operators within a given energy interval. They...
Oct
25
2019

High Energy Theory Seminar

Correlation Functions in AdS3/CFT2
Lorenz Eberhardt
1:45pm|Bloomberg Lecture Hall
Recently, an exact AdS3/CFT2 duality was proposed. String theory on AdS3xS3xT4 with one unit of pure NS-NS background flux was conjectured to be dual to the symmetric product orbifold of T4. This is established at the level of the full spectrum of...
Oct
04
2019

High Energy Theory Seminar - CANCELED

Duality Constraints on Superstring Scattering Amplitudes
Michael Green
1:45pm|Jadwin Hall, Room A06
This talk will review the structure of closed superstring scattering amplitudes with particular emphasis on the constraints imposed by various dualities. This leads to precise determination of the coefficients of low order terms in the low energy...
Sep
27
2019

High Energy Theory Seminar

Aspects of Scattering Amplitudes and Moduli Space Localization
Sebastian Mizera
1:45pm|Bloomberg Lecture Hall
We review a recent geometric formulation of the tree-level S-matrix of various quantum field theories, including gauge and gravity theories, in terms of intersection numbers of twisted cohomology groups on the moduli space of genus-zero curves with...
Apr
26
2019

High Energy Theory Seminar

Anomalies in the Space of Couplings and Dynamical Applications
Clay Cordova
1:45pm|Bloomberg Lecture Hall
Anomalies are invariants under renormalization group flow which lead to powerful constraints on the phases of quantum field theories. I will explain how these ideas can be generalized to families of theories labelled by coupling constants like the...
Physics