The Time Machine Factory [unspeakable, speakable] on Time Travel - TMF2024

Inner-extremal regular black holes from pure gravity

23 Sept 2024, 14:55

35m

Vallauri Hall (INRiM historical building, Turin)

talk Session II. Time travel and consistency

Speaker

Prof. David Kubiznak (Institute for Theoretical Physics, Charles University, Prague)

Description

It is well known that (static) regular black hole spacetimes can be sourced by appropriately chosen theories of non-linear electrodynamics. More recently, it was shown that many such models can also be obtained as solutions of vacuum gravity equations, upon considering an infinite series of quasi-topological higher curvature corrections. After reviewing both these approaches, I will show that the latter construction can be upgraded
to yield regular black holes with vanishing inner horizon surface gravity. In four dimensions, such a condition is necessary for the absence of classical instabilities associated with mass inflation on the inner horizon.

Presentation materials

Kubiznak_TurinFinal3.pdf