Romain Ruzziconi -Leaky boundary conditions in holography, BMS fluxes and flat limit скачать в хорошем качестве

Romain Ruzziconi -Leaky boundary conditions in holography, BMS fluxes and flat limit

In this talk, I will explain the interest of considering leaky boundary conditions in holography. I will start by presenting generic boundary conditions in asymptotically locally (A)dS spacetimes that yield some flux through the conformal boundary. Then, I will provide a specific example that leads to BMS-like symmetries in presence of non-vanishing cosmological constant. In the flat limit, these symmetries and the associated phase space reduce to those of Generalized BMS in asymptotically flat spacetimes. Finally, I will discuss the BMS flux algebra that has recently been shown to be relevant in the context of celestial holography.