60 citations · 214 across the 23 of their papers we have counts for
7 papers · 2 filters
On mass inflation and late-time divergences in limiting-curvature regular black holes
Johanna Borissova
Mass inflation in non-extremal regular black holes with a non-linear dependence of the Misner-Sharp mass on the asymptotic mass may be a transient phenomenon followed by…
Formation of extremal regular black holes
Johanna Borissova
Static and slowly evolving regular black holes with a non-extremal inner horizon are generally expected to suffer from mass inflation. Here we consider the scenario of asymptotic g…
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…
black hole thermodynamics in general quasi-topological gravity
Johanna Borissova
We present a unified framework for the discussion of black hole thermodynamics of -dimensional static black holes with spherical or compact hyperbolic horizon topology satisfyin…
Modified Friedmann equations and non-singular cosmologies in non-polynomial quasi-topological gravities
Johanna Borissova, João Magueijo
Quasi-topological theories of gravity are known to resolve black-hole singularities. We investigate whether the same mechanism can remove cosmological singularities. Focusing on no…
Regular black holes from pure gravity in four dimensions
Johanna Borissova, Raúl Carballo-Rubio
We derive static spherically symmetric regular black holes as vacuum solutions to purely gravitational theories in four dimensions. To that end, we construct four-dimensional non-p…
Effective geometrodynamics for renormalization-group improved black-hole spacetimes in spherical symmetry
Johanna Borissova, Raúl Carballo-Rubio
We consider the spherically reduced Einstein-Hilbert action, Einstein field equations and Schwarzschild spacetime modified by a renormalization-group (RG) scale-dependent gravitati…