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

Time machines, teleporters, and quasiregular singularities

25 Sept 2024, 15:10

25m

Vallauri Hall (INRiM historical building, Turin)

talk Session VI. Information paradox and thermodynamics of gravity

Speaker

Dr Justin Feng (CEICO, Institute of Physics of the Czech Academy of Sciences)

Description

In this talk, I review the Deutsch-Politzer spacetime, the related teleporter spacetime, and the quasiregular singularities necessarily present in such spacetimes. Such singularities, characterized by points with multiple future-directed and past-directed light cones, are generalizations of conical singularities and can reveal insights into topology change and the termination point of an evaporating black hole horizon. I then describe a gravity theory that can in principle provide a microscopic description for such singularities.

Presentation materials

Feng_TimTel_TMF2024.pdf