Archive of IAS Physics Group Meetings

Abstract: As well known, mesons with large spin J in large NcQCD can be described as rotating open strings using effective field theory (EFT). However, some subtleties arise for light quarks, due to the breakdown of the derivative expansion near the...

Abstract: I will begin by reviewing gauge/string duality, and in particular the motivations for understanding this duality better in the case of weakly coupled gauge theories. I will then discuss work in progress on two approaches to understanding...

Abstract: Recently, I have been trying to understand how large language models (LLMs) work, what their basic building blocks are and how they are trained. In this talk I want to share some of my understanding with you by discussing the so-called...

Abstract: Tidal deformation is a significant phenomenon observed in various astronomical scenarios, including black holes, and are a key gravitational-wave observable encoding information about the object's interior. Relying on hidden symmetries...

Abstract: I will consider the quantum fields along an observer's worldline to define a background independent algebra in quantum gravity.   The talk is based on a paper with the same title (arXiv:2308.03663).

Abstract: I will address the question of: what are the mathematical/functional forms of predictions made using perturbative QFT? Beyond one loop, very little about this question has been known until quite recently, in part due to the appearance of...

Abstract: While von Neumann entropies for local subregions in quantum field theory universally contain ultraviolet divergences, there is widespread belief that differences between von Neumann entropies can be finite and well-defined in many...

Abstract: We discuss shockwave geometries and the connections to aspects of flat space holography. We first show how the ’t Hooft commutation relations of shockwave operators are equivalent to the commutation relation between soft and Goldstone...