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Journal Articles General Relativity and Gravitation Year : 2015

Cosmological evolution of the gravitational entropy of the large-scale structure

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Giovanni Marozzi
  • Function : Author
Obinna Umeh
  • Function : Author
Chris Clarkson
  • Function : Author

Abstract

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 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.

Dates and versions

insu-03644719 , version 1 (19-04-2022)

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Giovanni Marozzi, Jean-Philippe Uzan, Obinna Umeh, Chris Clarkson. Cosmological evolution of the gravitational entropy of the large-scale structure. General Relativity and Gravitation, 2015, 47, ⟨10.1007/s10714-015-1955-8⟩. ⟨insu-03644719⟩
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