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Unitary evolution and uniqueness of the Fock quantization in flat cosmologies with compact spatial sections
Laura Castelló Gomar, Jerónimo Cortez, Daniel Martín-de Blas +2
We study the Fock quantization of scalar fields with a time dependent mass in cosmological scenarios with flat compact spatial sections. This framework describes physically interes…
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…
Unique Fock quantization of scalar cosmological perturbations
Mikel Fernández-Méndez, Guillermo A. Mena Marugán, Javier Olmedo +1
We investigate the ambiguities in the Fock quantization of the scalar perturbations of a Friedmann-Lemaître-Robertson-Walker model with a massive scalar field as matter content. We…
Criteria for the determination of time dependent scalings in the Fock quantization of scalar fields with a time dependent mass in ultrastatic spacetimes
Jerónimo Cortez, Guillermo A. Mena Marugán, Javier Olmedo +1
For Klein-Gordon fields, it is well known that there exist an infinite number of nonequivalent Fock representations of the canonical commutation relations and, therefore, of inequi…