Year: 2014
Type: preprint
Abstract: Since microscopic velocity diffusion can be incorporated into general relativity in a consistent way, we study cosmological background solutions when the diffusion phenomena takes place in an expanding universe. Our focus here relies on the nature of the diffusion coefficient $σ$ which measures the magnitude of such transport phenomena. We test dynamics where $σ$ has a phenomenological dependence on the scale factor, the matter density, the dark energy and the expansion rate.
Source: arXiv (Cornell University)
Authors: Velten, Hermano, Calogero, Simone
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1659155002