49 citations · 286 across the 14 of their papers we have counts for
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Unique fermionic vacuum in de Sitter spacetime from hybrid quantum cosmology
Beatriz Elizaga Navascués, Guillermo A. Mena Marugán, Santiago Prado
In this work we show how the criterion of asymptotic Hamiltonian diagonalization originated in hybrid quantum cosmology serves to pick out a unique vacuum for the Dirac field in de…
Asymptotic diagonalization of the fermionic Hamiltonian in hybrid loop quantum cosmology
Beatriz Elizaga Navascués, Guillermo A. Mena Marugán, Santiago Prado
We use the freedom available in hybrid loop quantum cosmology to split the degrees of freedom between the geometry and the matter fields so as to build a quantum field theory for t…
Hamiltonian diagonalization in hybrid quantum cosmology
Beatriz Elizaga Navascués, Guillermo A. Mena Marugán, Thomas Thiemann
We explore the possibility of selecting a natural vacuum state for scalar and tensor gauge-invariant cosmological perturbations in the context of hybrid quantum cosmology, by ident…
The Martin-Benito-Mena Marugan-Olmedo prescription for the Dapor-Liegener model of Loop Quantum Cosmology
Alejandro García-Quismondo, Guillermo A. Mena Marugán
Recently, an alternative Hamiltonian constraint for Loop Quantum Cosmology has been put forward by Dapor and Liegener, inspired by previous work on regularization due to Thiemann.…
The Vacuum State of Primordial Fluctuations in Hybrid Loop Quantum Cosmology
Beatriz Elizaga Navascués, Daniel Martín de Blas, Guillermo A. Mena Marugán
We investigate the role played by the vacuum of the primordial fluctuations in hybrid Loop Quantum Cosmology. We consider scenarios where the inflaton potential is a mass term and…
Backreaction of fermionic perturbations in the Hamiltonian of hybrid loop quantum cosmology
Beatriz Elizaga Navascués, Guillermo A. Mena Marugán, Santiago Prado Loy
We discuss the freedom available in hybrid loop quantum cosmology to define canonical variables for the matter content and investigate whether this can be used to derive a quantum…
Unique Fock quantization of a massive fermion field in a cosmological scenario
Jerónimo Cortez, Beatriz Elizaga Navascués, Mercedes Martín-Benito +2
It is well known that the Fock quantization of field theories in general spacetimes suffers from an infinite ambiguity, owing to the inequivalent possibilities in the selection of…
Quantum corrections to the Mukhanov-Sasaki equations
Laura Castelló Gomar, Mercedes Martín-Benito, Guillermo A. Mena Marugán
Recently, a lot of attention has been paid to the modifications of the power spectrum of primordial fluctuations caused by quantum cosmology effects. The origin of these modificati…
Inclusion of matter in inhomogeneous loop quantum cosmology
Daniel Martín-de Blas, Mercedes Martín-Benito, Guillermo A. Mena Marugán
We study the hybrid quantization of the linearly polarized Gowdy model with a massless scalar field with the same symmetries as the metric. For simplicity, we quantize its re…
Inhomogenous loop quantum cosmology with matter
Daniel Martín-de Blas, Mercedes Martín-Benito, Guillermo A. Mena Marugán
The linearly polarized Gowdy model with a massless scalar field with the same symmetries as the metric is quantized by applying a hybrid approach. The homogeneous geometry de…
Uniqueness of the Fock quantization of scalar fields under mode preserving canonical transformations varying in time
Jerónimo Cortez, Lucía Fonseca, Daniel Martín-de Blas +1
We study the Fock quantization of scalar fields of Klein-Gordon type in nonstationary scenarios propagating in spacetimes with compact spatial sections, allowing for different fiel…
Uniqueness of the Fock quantization of scalar fields in spatially flat cosmological spacetimes
Laura Castelló Gomar, Jerónimo Cortez, Daniel Martín-de Blas +2
We study the Fock quantization of scalar fields in (generically) time dependent scenarios, focusing on the case in which the field propagation occurs in --either a background or ef…
A complete hybrid quantization in inhomogeneous cosmology
Mikel Fernández-Méndez, Guillermo A. Mena Marugán, Javier Olmedo
A complete quantization of a homogeneous and isotropic spacetime with closed spatial sections coupled to a massive scalar field is provided, within the framework of Loop Quantum Co…
Matter in inhomogeneous loop quantum cosmology: the Gowdy model
Mercedes Martín-Benito, Daniel Martín-de Blas, Guillermo A. Mena Marugán
We apply a hybrid approach which combines loop and Fock quantizations to fully quantize the linearly polarized Gowdy model in the presence of a massless scalar field with the…