138 citations · 418 across the 12 of their papers we have counts for
11 papers · 1 filter
Master variables and Darboux symmetry for axial perturbations of the exterior and interior of black hole spacetimes
Michele Lenzi, Guillermo A. Mena Marugán, Andrés Mínguez-Sánchez +1
Recent efforts have shown that Kantowski-Sachs spacetime provides a useful framework for analyzing perturbations inside a Schwarzschild black hole (BH). In these studies, the adopt…
Expansion-sensitive coupling of a local quantum system in de Sitter cosmology
Jorma Louko, Guillermo A. Mena Marugán, Alvaro Torres-Caballeros
When a local quantum system couples to a quantum field in a cosmological spacetime, the time dependence of the coupling strength is conventionally taken to reflect the design of th…
A Brief Overview of Results about Uniqueness of the Quantization in Cosmology
Jerónimo Cortez, Guillermo A. Mena Marugán, José M. Velhinho
The purpose of this review is to provide a brief overview of some recent conceptual developments about possible criteria to guarantee the uniqueness of the quantization in a variet…
Quantum linear scalar fields with time dependent potentials: Overview and applications to cosmology
Jerónimo Cortez, Guillermo A. Mena Marugán, José Velhinho
In this work, we present an overview of uniqueness results derived in recent years for the quantization of Gowdy cosmological models and for (test) Klein-Gordon fields minimally co…
Correlations across horizons in quantum cosmology
Ana Alonso-Serrano, Luis J. Garay, Guillermo A. Mena Marugan
Different spacetime regions separated by horizons are not related to each other. We know that this statement holds for classical spacetimes. In this paper we carry out a canonical…
Modeling effective FRW cosmologies with perfect fluids from states of the hybrid quantum Gowdy model
Beatriz Elizaga Navascués, Mercedes Martín-Benito, Guillermo A. Mena Marugán
We employ recently developed approximation methods in the hybrid quantization of the Gowdy model with linear polarization and a massless scalar field to obtain physically int…