## – 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`.