Backreaction in cosmic screening approach’
Backreaction in cosmic screening approach’
Eingorn, M.; O’Briant, B.; Diouf, A.; Zhuk, O.
Abstract
We investigate the backreaction of nonlinear perturbations on the global evolution of the Universe within the cosmic screening approach. To this end, we have considered the second-order scalar perturbations. An analytical study of these perturbations followed by a numerical evaluation shows that, first, the corresponding average values have a negligible backreaction effect on the Friedmann equations and, second, the second-order correction to the gravitational potential is much less than the first-order quantity. Consequently, the expansion of perturbations into orders of smallness in the cosmic screening approach is correct.
Keywords: Inhomogeneous UniverseCosmological perturbationsBackreactionCosmic screening
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Physics Letters B 839(2023), 137797
DOI: 10.1016/j.physletb.2023.137797
Cited 1 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-38451