Archive of IAS Physics Group Meetings

Abstract: Based on https://arxiv.org/abs/2408.11139 . In this talk we'll explain how self-dual metrics (which correspond to spacetimes containing only positive helicity gravitons) can be written as a sum over connected "tree" diagrams, which are...

Abstract: Non-invertible categorical symmetries have emerged as a powerful tool to uncover new beyond-Landau quantum phases and phase transitions. The general theory of such phases and transitions has been studied systematically primarily in (1+1)d...

Abstract: In the AdS/CFT correspondence, it is of great importance to understand the emergence of bulk geometry from quantum mechanical degrees of freedom on the boundary. Volumes of spatial subregions are key quantities characterizing the bulk...

Abstract: Tensor network states are new kinds of variational wavefunctions that help us to understand quantum phases and phase transitions beyond Landau paradigm. In this talk, I will first review the major development of tensor network simulation...

In this first group meeting of the academic year, we will all introduce ourselves and give a short description of our current research.

The plan for future group meetings is for members, visitors and faculty to give a pedagogical introductory talk on...

Abstract: In this talk, we'll review the bootstrap method that uses unitarity and causality (analyticity + crossing) to constrain low-energy effective field theories (EFTs), especially those including gravitational couplings. This method allows us...

Abstract: Tidal deformabilities serve as an effective tool to study the structures of compact objects. In the first part of the talk, I will present how the worldline effective field theory (EFT) can be applied to examine the tidal responses of...

Abstract: Higgs branches in theories with 8 supercharges change as one tunes the gauge coupling to critical values.

This talk will focus on six dimensional (0,1) supersymmetric theories in studying the different phenomena associated with such a...

Abstract: I will compare the gravitational sectors of two 10d heterotic string theories, with E8 x E8 and Spin(32)/$Z_2$ gauge groups, and show that they differ by a subtle $Z_3$-valued topological term. I also discuss its relation to the...