67 citations · 282 across the 15 of their papers we have counts for
4 papers · 1 filter
Improved WKB analysis of cosmological perturbations
Roberto Casadio, Fabio Finelli, Mattia Luzzi +1
Improved Wentzel-Kramers-Brillouin (WKB)-type approximations are presented in order to study cosmological perturbations beyond the lowest order. Our methods are based on functions…
Thermodynamics of a collapsing shell in an expanding Universe
G. L. Alberghi, R. Casadio, G. Venturi
We describe the quasi-static collapse of a radiating, spherical shell of matter in de Sitter space-time using a thermodynamical formalism. It is found that the specific heat at con…
Gravitational collapse and black hole evolution: do holographic black holes eventually "anti-evaporate"?
Roberto Casadio, Cristiano Germani
We study the gravitational collapse of compact objects in the Brane-World. We begin by arguing that the regularity of the five-dimensional geodesics does not allow the energy-momen…
Particle Production in Tachyon Condensation
G. L. Alberghi, R. Casadio, A. Tronconi
We study particle production in the tachyon condensation process as described by different effective actions for the tachyon. By making use of invariant operators, we are able to o…