Archive of IAS Physics Group Meetings

In this discussion I will present the background to the integration-by-parts (IBP) machinery as used for Feynman integrals, and its applications. I will also discuss recent work linking IBP to some aspects of the algebraic geometry underlying...

This discussion will focus on the question of how locality on distance scales smaller than the AdS radius can emerge from a CFT. We will introduce Landau singularities as a sign of locality in QFT, and discuss the extent to which they are present...

I'll start reviewing some aspects of my paper with K. Hori [1] about localization of Gauged Linear Sigma Models (GLSM) on a disc/hemisphere. The focus is on a special class of boundary conditions corresponding to B-branes. I'll then review the...

I would like to discuss the idea that CFT entanglement explains gravity in AdS/CFT. van Raamsdonk et al. [1] showed that the linearized Einstein equations about the AdS vacuum are equivalent to the entanglement first law in CFT’s, assuming the Ryu...

I will discuss the status of the controversial "entropy bounds" proposed by Bekenstein and Bousso, as well as the reinterpretation of these bounds by Casini and others which made them actually true in QFT.

Old View:

* Wall, arXiv:0901.3865 [review...

We would like to discuss about soft gravitons. On the one hand, they enter in the soft theorems of gravity scattering which exhibit universal structures useful in the S-matrix program (e.g., 1404.4091, 1406.6987). On the other hand, they appear in...

The pure spinor formalism is an alternative description of the superstring which is manifestly spacetime supersymmetric and can be covariantly quantized. As a consequence, in recent years many superstring amplitudes which were impractical to...

Scattering amplitudes, in a wide variety of gauge theories, and independent of dimension and gauge group, have surprising kinematic structure which is currently only understood in terms of graphical rules relating the kinematic weights of graphs, in...