A relation between diffusion, temperature and the cosmological constant
Abstract
We show that the temperature of a diffusing fluid with the diffusion constant κ2 in an expanding universe approaches a constant limit T∞ = κ2 H in its final de Sitter stage characterized by the horizon 1 H determined by the Hubble constant. If de Sitter surface temperature in the final equilibrium state coincides with the fluid temperature, then the cosmological constant Λ = 3H2 = 6πκ2.
 Publication:

Modern Physics Letters A
 Pub Date:
 July 2016
 DOI:
 10.1142/S0217732316501467
 arXiv:
 arXiv:1604.00251
 Bibcode:
 2016MPLA...3150146H
 Keywords:

 Exponential expansion;
 de Sitter temperature;
 diffusion;
 dark matter;
 98.80.k;
 98.80.Es;
 95.35.+d;
 Cosmology;
 Observational cosmology;
 Dark matter;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory;
 Mathematical Physics
 EPrint:
 9 pages