(1) Area d. Fis. Teor., Univ. de Salamanca, Spain;(2) UCV, Caracas, Venezuela;(3) Universidad Central de Venezuela, Caracas, Venezuela;(4) Dept. Fis., Univ. Auton. de Barcelona, Bellaterra, Spain
Abstract:
We comment on recently proposed dissipative inflationary models. It is shown that the strength of the inflationary expansion is related to a specific combination of thermodynamic variables which is known to measure the instability of self-gravitating dissipative systems.