48 citations · 90 across the 6 of their papers we have counts for
6 papers
Pressure profile bounds from relaxing the TOV equation
Christopher Simmonds, Matt Visser
We develop several new and quite general bounds on the internal pressure profiles of general relativistic perfect fluid spheres --- based on various ways of relaxing the TOV system…
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…
Revisiting Schwarzschild's constant density star in isotropic coordinates
Christopher Simmonds, Matt Visser
Herein we shall revisit the venerable 110-year-old topic of Schwarzschild's constant density star, emphasizing that for many (though not quite all) purposes it is much easier to an…
Effective geometrostatics of spherical stars beyond general relativity
Julio Arrechea, Raúl Carballo-Rubio, Matt Visser
We provide a set of general tools to study the problem of stellar equilibrium in any gravitational theory in which spherically symmetric spacetimes satisfy master field equations t…
Signature change events: A challenge for quantum gravity?
Angela White, Silke Weinfurtner, Matt Visser
Within the framework of either Euclidian (functional-integral) quantum gravity or canonical general relativity the signature of the manifold is a priori unconstrained. Furthermore,…
Analogue spacetime based on 2-component Bose-Einstein condensates
Silke Weinfurtner, Stefano Liberati, Matt Visser
Analogue spacetimes are powerful models for probing the fundamental physical aspects of geometry - while one is most typically interested in ultimately reproducing the pseudo-Riema…