Thermodynamical properties of metric fluctuations during inflation

Abstract

I study a thermodynamical approach to scalar metric perturbations during the inflationary stage. In the power-law expanding universe here studied, I find a negative heat capacity as a manifestation of superexponential growing for the number of states in super Hubble scales. The power spectrum depends on the Gibbons-Hawking and Hagedorn temperatures.

7 pages, no figures (accepted to publication in General Relativity and Gravitation)

References in corpus (1)

• On the Back Reaction Problem for Gravitational Perturbations

Cited by in corpus (2)

• Gravitational collapse of a Hagedorn fluid in Vaidya geometry
• Null fluid collapse in brane world models