Title: Differential Double Copy in (A)dS

Speaker: Hayden Lee (the University of Chicago)

Time: 10:30am, Apr 06 (Thursday) 2023

腾讯会议: 823-466-567

Abstract: Double-copy relations are remarkable properties of scattering amplitudes that express graviton amplitudes as two copies of gluon amplitudes. In this talk I will present the generalization of these relations to (A)dS correlators. I will describe a set of differential operators in (A)dS which naturally generalize on-shell kinematics of amplitudes in flat space. This provides a way to construct (A)dS correlators by replacing the kinematic variables of amplitudes with the corresponding differential operators and suitably ordering them. By construction, the resulting correlators are manifestly conformally invariant with the correct flat-space limit, and exhibit a differential double-copy structure.

Bio: Hayden Lee is currently a KICP postdoctoral fellow at the University of Chicago where he studies theoretical aspects of cosmology and gravitation. He received his PhD from the University of Cambridge in 2017 and was a postdoc at Harvard University until 2021. His research primarily focuses on combining modern field theory methods and cosmology to understand the structure of cosmological correlations.