Cosmological Grassmannian: A Natural Language for Spinning AdS / Cosmological Correlators 

Abstract

Spinning Cosmological Correlators are notorious for their complicated structure. In this talk, the speaker will introduce a new kinematics space, known as the Cosmological Grassmannian, which reveals the hidden simplicity of these spinning correlators. He will explain how this kinematics space makes the constraints of a massless spinning correlator (namely current conservation and de Sitter isometry) manifest. He will also go over some examples of three point and four point correlators, and explain how properties such as flat space limit and factorization are manifest in this space. 


About the Speaker

Dr. Gordon Mang Hei LEE is currently a postdoctoral researcher at National Taiwan University. He obtained his PhD from the University of Cambridge in 2024. Dr. Lee mainly works on understanding the structure of Cosmological Correlators, as well as their interplay with various fundamental principles of physics such as unitarity and symmetry. 


About the Center for Fundamental Physics

For more information, please refer to https://iascfp.hkust.edu.hk/.


For Attendees' Attention

Seating is on a first come, first served basis.