General Relativity and Quantum Cosmology
[Submitted on 20 Jan 2015 (v1), last revised 1 Sep 2015 (this version, v2)]
Title:Cosmological evolution of the gravitational entropy of the large-scale structure
View PDFAbstract:We consider the entropy associated with the large-scale structure of the Universe in the linear regime, where the Universe can be described by a perturbed Friedmann-Lemaître spacetime. In particular, we compare two different definitions proposed in the literature for the entropy using a spatial averaging prescription. For one definition, the entropy of the large-scale structure for a given comoving volume always grows with time, both for a CDM and a $\Lambda$CDM model. In particular, while it diverges for a CDM model, it saturates to a constant value in the presence of a cosmological constant. The use of a light-cone averaging prescription in the context of the evaluation of the entropy is also discussed.
Submission history
From: Giovanni Marozzi Dr. [view email][v1] Tue, 20 Jan 2015 18:22:56 UTC (334 KB)
[v2] Tue, 1 Sep 2015 18:07:05 UTC (334 KB)
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