http://arxiv.org/abs/1801.06155
We consider the short period of cosmic expansion ranging from the end of the Planck era to the beginning of inflation and set upper and lower limits on the temperature of the radiation at the commencement of the inflationary phase.
R. Herrera, D. Pavon and J. Saavedra
Fri, 19 Jan 18
27/68
Comments: 10 pages, 1 eps figure, key words: cosmology, early Universe, inflation, thermodynamics