25 citations · 135 across the 23 of their papers we have counts for
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Particle creation and the Schwinger model
José Navarro-Salas, Silvia Pla
We study the particle creation process in the Schwinger model coupled with an external classical source. One can approach the problem by taking advantage that the full quantized mo…
Equivalence of the adiabatic expansion and Hadamard renormalization for a charged scalar field
Silvia Pla, Elizabeth Winstanley
We examine the relationship between three approaches (Hadamard, DeWitt-Schwinger and adiabatic) to the renormalization of expectation values of field operators acting on a charged…
Adiabatic regularization and preferred vacuum state for the field theory in cosmological spacetimes
Antonio Ferreiro, Silvia Pla
We extend the method of adiabatic regularization by introducing an arbitrary parameter for a scalar field with quartic self-coupling in a Friedmann-Lemaître-Robertson-Walker (F…
Renormalization and a non-adiabatic vacuum choice in a radiation-dominated universe
Pau Beltrán-Palau, Sergi Nadal-Gisbert, José Navarro-Salas +1
Vacuum and particles can be naturally defined in the adiabatic regime of an expanding universe. In general, however, there is no preferred choice of a vacuum state, unless the spac…
Hadamard and boundary conditions for the Big Bang quantum vacuum
Pau Beltrán-Palau, Sergi Nadal-Gisbert, José Navarro-Salas +1
General relativity predicts final-type singularities inside black holes, as well as a cosmological initial-type singularity. Cosmic censorship protects external observers from blac…