Valentin Boyanov (Instituto Superior Técnico)

will speak on

Semiclassical evolution of black holes with inner horizons

Time: 10:00AM
Date: Wed 19th March 2025
Location: (See abstract) [map]

Abstract: This seminar will take place in Science East E1.19.

I will begin by giving an overview of the known instabilities associated with black hole geometries which have an inner apparent horizon, both in classical and semiclassical gravity. Particularly, I will focus on the difference in these instabilities between the cases of eternal black holes and dynamically formed ones. I will then present results on the full non-linear evolution of a dynamically formed charged spherical black hole, including the Polyakov approximation to the renormalised stress-energy tensor of a quantum scalar field as the semiclassical component. The result of this evolution involves the full evaporation of the trapped region, with both an inward motion of the outer horizon and an outward motion of the inner horizon. Additionally, a long-lived anti-trapped region appears in the wake of the evaporation.

(This talk is part of the Applied and Computational Mathematics series.)

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