Speaker: Valentin Boyanov Savov (Madrid U.)
Title: Vacuum polarization and regular gravitational collapse
Quantum field theory in curved spacetimes tells us that black hole horizons are hardly the eternal one-way barriers which classical General Relativity describes. Hawking radiation is emitted, and the trapped region evaporates, but this is only a small part of what this semiclassical approximation to gravity can tell us about the evolution of black holes. In this talk I will present some of the results from my thesis regarding the magnitude and effect of semiclassical corrections on geometries with trapped regions. First I will present a detailed study of the spacetime dynamics necessary for an outer apparent horizon to exhibit significant deviations from the standard picture of slow Hawking evaporation. Then I will move on to the inner apparent horizon, and present the semiclassical analogue of the mass inflation instability, discussing its implications for the causal structure of realistic black hole spacetimes.
Room: Sala de Reuniões e Seminários (2nd Floor of physics building)