Mass and entropy of asymptotically flat eternal quantum black holes in 2D

Speaker's Name: Diego Pardo Santos
Speaker's Affiliation: King's College London
Speaker's Research Theme(s): Mathematical Physics
Abstract:
Semi-classical dilaton gravity in (1+1)-dimensions remains one of the only arenas where quantum black holes can be exactly constructed, fully accounting for backreaction due to quantum matter. In this talk, I'll provide a comprehensive analysis of the mass and thermodynamic properties of static asymptotically flat quantum black holes both analytically and numerically. First, I analytically investigate eternal quantum black hole solutions to a one-parameter family of analytically solvable models interpolating between Russo-Susskind-Thorlacius and Bose, Parker, and Peleg gravities. Examining these models in a semi-classically allowed parameter space, I find naked singularities may exist for quantum fields in the Boulware state. Using a quasi-local formalism, where we confine the black hole to a finite sized cavity, I derive the conserved energy and analyse the system's thermal behaviour. Specifically, I show the semi-classical Wald entropy precisely equals the generalized entropy, accounting for both gravitational and fine-grained matter entropies, and we find a range where the quantum black holes are thermally stable. Finally, I numerically construct eternal black hole solutions to semi-classical Callan-Giddings-Harvey-Strominger gravity and find their thermal behaviour is qualitatively different from their analytic counterparts. In the process, I develop an analytic expansion of the solutions and find it accurately approximates the full numerical solutions in the semi-classical limit. --- Related eprint: https://arxiv.org/abs/2512.19812

Venue: Physics B17

Online Conference Link: https://teams.microsoft.com/meet/34246569224862?p=LHI4nFADPoZH3atFtR 

Meeting ID: 342 465 692 248 62

Passcode: AM9Bh2Vd