219 citations · 2.2k across the 94 of their papers we have counts for
5 papers · 1 filter
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…
Cosmological perturbations in Hybrid Loop Quantum Cosmology: Mukhanov-Sasaki variables
Laura Castelló Gomar, Mikel Fernández-Méndez, Guillermo A. Mena Marugán +1
We study cosmological perturbations in the framework of Loop Quantum Cosmology, using a hybrid quantization approach and Mukhanov-Sasaki variables. The formulation in terms of thes…
Uniqueness of the Fock quantization of scalar fields and processes with signature change in cosmology
Laura Castelló Gomar, Guillermo A. Mena Marugán
We study scalar fields subject to an equation of the Klein-Gordon type in nonstationary spacetimes, such as those found in cosmology, assuming that all the relevant spatial depende…
Effective dynamics of scalar perturbations in a flat Friedmann-Robertson-Walker spacetime in Loop Quantum Cosmology
Mikel Fernández-Méndez, Guillermo A. Mena Marugán, Javier Olmedo
We study the evolution of a homogeneous and isotropic spacetime whose spatial sections have three-torus topology, coupled to a massless scalar field with small scalar perturbations…