Multiscale cosmological dynamics

Claire Chevalier, Fabrice Debbasch and Yann Ollivier

Physica A: Statistical Mechanics and its Applications, 2009, vol. 388, issue 24, 5029-5035

Abstract: The recently developed mean field theory of relativistic gravitation predicts the emergence of an “apparent matter” field at large scales describing the net effect of small-scale fluctuations on the large-scale dynamics of the universe. It is found that this so-called back reaction effect is much stronger for gravitational waves than for matter density fluctuations. At large scales, gravitational waves behave like radiation and, for them, the perturbative effect scales as the squared relative amplitude times squared frequency. In particular, a bath of gravitational waves of relative amplitude 10−5 and frequency 10−12Hz would not be directly detectable by today’s technology but would generate an effective large-scale radiation of amplitude comparable to the unperturbed matter density of the universe.

Keywords: Relativistic statistical physics; Gravitation (search for similar items in EconPapers)
Date: 2009
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:388:y:2009:i:24:p:5029-5035

DOI: 10.1016/j.physa.2009.08.012

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