Silvia Nagy (Durham University)

Title: Self-dual gravity and color/kinematics duality in curved backgrounds

Abstract: I will show that self-dual gravity in Euclidean four-dimensional Anti-de Sitter space (AdS4​) can be described by a minimally coupled scalar field with a cubic interaction written in terms of a deformed Poisson bracket, providing a remarkably simple generalisation of the Plebanski action for self-dual gravity in flat space. This implies a novel symmetry algebra in self-dual gravity, notably an AdS4​ version of the so-called kinematic algebra. This provides a concrete starting point for defining the double copy for Einstein gravity in AdS4​ by expanding around the self-dual sector. Moreover, I will show that the new kinematic Lie algebra can be lifted to a deformed version of the w1+∞​ algebra, which plays a prominent role in celestial holography.

This talk will be in hybrid mode via zoom, please contact the seminar organisers to obtain the password.
To receive seminar announcements via email, please request a subscription to the mailing list qft-seminars-physics. This is done by sending an email to sympa@lists.hu-berlin.de with subject line “subscribe qft-seminars-physics FIRSTNAME LASTNAME”.