From the 1 of 14 linked papers with an AI index.
14 papers
Semiclassical Black Hole-White Hole transitions: an analytical treatment
Julio Arrechea, Stefano Liberati, Massimiliano Spadafora
Recent numerical studies of semiclassical gravity suggest that, in spherically symmetric black holes with both outer and inner horizons, the semiclassical instability of the inner…
A parity selection rule for regular black holes
Farid Thaalba, Julio Arrechea, Stefano Liberati
Regular black hole metrics are usually studied kinematically, but a finite-curvature static core does not guarantee that the underlying theory can consistently evolve generic matte…
Off-shell equivalence in quantum field theory and gravity
Iberê Kuntz, Stefano Liberati
The paper proposes an operational criterion based on the Vilkovisky–DeWitt effective action to determine when two quantum field theory or gravity formulations are equivalent off sh…
Semiclassical regularity of compact trapped regions: From dynamical horizons to inner extremality
Raúl Carballo-Rubio, Francesco Di Filippo, Stefano Liberati +1
In eternal black-hole spacetimes, inner horizons are Cauchy horizons and are generically unstable. For non-extremal inner horizons, this includes both the classical mass-inflation…
Einstein-aether Elliptic Charges and the First Law of Asymptotically AdS Black Holes
Walter Arata, Moustafa Ismail, Stefano Liberati +3
We investigate the thermodynamic role of asymptotic aether alignment for universal horizons in Einstein-aether theory. In the static, spherically symmetric, asymptotically AdS sect…
Null geodesic defocusing in dynamical black-hole-to-white-hole transitions
Johanna Borissova, Stefano Liberati, Matt Visser
We investigate the defocusing of null geodesics in dynamical, non-singular black-hole-to-white-hole transitions. Working at the level of spacetime kinematics, and without assuming…