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Uniqueness Criteria for the Fock Quantization of Dirac Fields and Applications in Hybrid Loop Quantum Cosmology
Jerónimo Cortez, Beatriz Elizaga Navascués, Guillermo A. Mena Marugán +2
In generic curved spacetimes, the unavailability of a natural choice of vacuum state introduces a serious ambiguity in the Fock quantization of fields. In this review, we study the…
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…
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…