Reparametrization Invariance, from glasses to toy black holes.

by Jorge Kurchan (ENS Paris)

Friday 9 Feb 2024, 14:30 → 16:00 Europe/Rome

Sala Lauree (Dipartimento di Fisica - Ed. G.Marconi)

Glassy dynamics have time-reparametrization `softness': glasses
fluctuate, and respond to external perturbations, primarily by
changing the pace of their evolution. Remarkably, the same situation
also appears in toy models of quantum field theory such as the
Sachdev-Ye-Kitaev (SYK) model, where the excitations associated to
reparametrizations play the role of an emerging `gravity'. I will
describe how these two seemingly unrelated systems share common
features, arising from a technically very similar origin. Apart from
the curiosity that this correspondence naturally arouses, there is
also the hope that developments in each field may be useful for the
other.