219 citations · 2.2k across the 94 of their papers we have counts for
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Unitary evolution and uniqueness of the Fock representation of Dirac fields in cosmological spacetimes
Jerónimo Cortez, Beatriz Elizaga Navascués, Mercedes Martín-Benito +2
We present a privileged Fock quantization of a massive Dirac field in a closed Friedmann-Robertson-Walker cosmology, partially selected by the criteria of invariance of the vacuum…
Quantum unitary dynamics in cosmological spacetimes
Jeronimo Cortez, Guillermo A. Mena Marugan, Jose M. Velhinho
We address the question of unitary implementation of the dynamics for scalar fields in cosmological scenarios. Together with invariance under spatial isometries, the requirement of…
Cosmological Signatures of Anisotropic Spatial Curvature
Thiago S. Pereira, Guillermo A. Mena Marugán, Saulo Carneiro
If one is willing to give up the cherished hypothesis of spatial isotropy, many interesting cosmological models can be developed beyond the simple anisotropically expanding scenari…
Modified FRW cosmologies arising from states of the hybrid quantum Gowdy model
Beatriz Elizaga Navascués, Mercedes Martín-Benito, Guillermo A. Mena Marugán
We construct approximate solutions of the hybrid quantum Gowdy cosmology with three-torus topology, linear polarization, and local rotational symmetry, in the presence of a massles…
Gauge-Invariant Perturbations in Hybrid Quantum Cosmology
Laura Castelló Gomar, Mercedes Martín-Benito, Guillermo A. Mena Marugán
We consider cosmological perturbations around homogeneous and isotropic spacetimes minimally coupled to a scalar field and present a formulation which is designed to preserve covar…