Archive of IAS Physics Group Meetings

Jan
30
2019

Physics Group Meeting

Light-ray Operators in CFT
1:45pm|Bloomberg Hall Physics Library
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...
Dec
12
2018

Physics Group Meeting

Introduction to Four-Dimensional Chern-Simons Theory
1:45pm|Bloomberg Hall Physics Library
I will discuss an approach to integrable models from a four-dimensional Chern-Simons-type gauge theory. For introduction please have a look at E. Witten arXiv:1611.00592 or K. Costello arXiv:1308.0370. It might be interesting to look into some...
Nov
28
2018

Physics Group Meeting

Mapping the Swampland
Tom Rudelius
1:45pm|Bloomberg Hall Physics Library
I will introduce the notion of the Swampland, first defined in 0509212/hep-th. I will then discuss a number of Swampland Conjectures, including "No Global Symmetries" (1011.5120/hep-th, 1810.05337/hep-th), the "Weak Gravity Conjecture" (0601001/hep...
Nov
14
2018

Physics Group Meeting

Nonsupersymmetric D-branes
1:45pm|Bloomberg Hall Physics Library
These were originally discovered by Sen (see hep-th/9808141, hep-th/9809111, hep-th/9904207, for example). Another interesting paper is by Kraus and Larsen, hep-th/0012198.
I will describe a new perspective based on anomalies.
Nov
07
2018

Physics Group Meeting

Boundary Entropy in Integrable QFTs
1:45pm|Bloomberg Lecture Hall
I will give introduction to general integrability-based methods to study two-dimensional quantum field theories. The goal (which I don't think I will achieve) is to explain how to compute the boundary entropy (also known as "g-function"), which...
Oct
31
2018

Physics Group Meeting

Relative Entropy and Energy Conditions in QFT
1:45pm|Bloomberg Hall Physics Library
I will review the averaged null energy condition, the Markov property and the quantum null energy condition in quantum field theory from an information-theoretic point of view. I will give some explicit examples from finite quantum systems and free...
Oct
24
2018

Physics Group Meeting

Information Geometry and Machine Learning as Tools for Phenomenology
1:45pm|Bloomberg Hall Physics Library
I will discuss particle physics phenomenology from the point of view of statistical inference.
I will describe how the concept of information geometry can be used to equip the parameter space of a theory with a metric.
The central object in this...
Oct
17
2018

Physics Group Meeting

Soft Particles and Symmetry
Daniel Kapec
1:45pm|Bloomberg Hall Physics Library
I will review some of the connections between asymptotic symmetry groups, soft theorems for scattering amplitudes, and memory effects. If time permits I will also discuss special boundary operators for asymptotically flat gravity and their relation...