Europe/Lisbon — Online

Laura Donnay, Technical University of Vienna
Quantum BMS transformations in conformally flat space-times and holography

In this talk, we will start by a review of the salient features of the so-called BMS symmetries, which appear as asymptotic symmetries of flat spacetimes, but turn out to be also present in the near-horizon region of black holes. We will then turn to quantum aspects of BMS symmetries in conformally flat spacetimes. After presenting asymptotic and conformal Killing vectors in $d$-dimensional Minkowski and several conformally flat spacetimes, we will show that the associated quantum charges for an arbitrary CFT satisfy a closed algebra that includes the BMS as a sub-algebra (i.e. supertranslations and superrotations) plus a novel transformation we call superdilations. At the end of the talk, we will discuss possible applications of these results for holography and black hole physics.

Video

Unusual hour.

Projecto FCT UIDB/04459/2020.