Non-Oscillatory Power Spectrum From States of Low Energy in Kinetically Dominated Early Universes
Metadatos
Afficher la notice complèteEditorial
Frontiers Media
Materia
Loop quantum cosmology Inflation Primordial perturbations Power spectra Quantum field theory in curved spacetimes States of low energy Non-oscillatory vacuum state
Date
2021-08-17Referencia bibliográfica
Martín-Benito M, Neves RB and Olmedo J (2021) Non-Oscillatory Power Spectrum From States of Low Energy in Kinetically Dominated Early Universes. Front. Astron. Space Sci. 8:702543. [doi: 10.3389/fspas.2021.702543]
Patrocinador
FEDER2014-2020 Junta de Andalucía-Consejería de Economía y Conocimiento E-FQM-262-UGR18; Spanish Government FIS2017-86497-C2-2-P, PID2019-105943GB-I00; Fundação para a Ciência e a Tecnologia; Universidad de Granada; Fundació Catalana de Trasplantament SFRH/BD/143525/2019Résumé
Recently, States of Low Energy (SLEs) have been proposed as viable vacuum states of primordial perturbations within Loop Quantum Cosmology (LQC). In this work we investigate the effect of the high curvature region of LQC on the definition of SLEs. Shifting the support of the test function that defines them away from this regime results in primordial power spectra of perturbations closer to those of the so-called Non-oscillatory (NO) vacuum, which is another viable choice of initial conditions previously introduced in the LQC context. Furthermore, through a comparison with the Hadamard-like SLEs, we prove that the NO vacuum is of Hadamard type as well.