Europhys. Lett.
Volume 73, Number 1, January 2006
Page(s) 149 - 155
Section Geophysics, astronomy, and astrophysics
Published online 23 November 2005
Europhys. Lett., 73 (1), pp. 149-155 (2006)
DOI: 10.1209/epl/i2005-10350-5

Slow rolling, inflation, and quintessence

M. Capone1, C. Rubano2, 3 and P. Scudellaro2, 3

1  Dipartimento di Fisica, Politecnico di Torino Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
2  Dipartimento di Scienze Fisiche, Università Federico II di Napoli Complesso Universitario di Monte S. Angelo - Via Cintia, Ed. N, I-80126 Napoli, Italy
3  Istituto Nazionale di Fisica Nucleare, Sez. Napoli Complesso Universitario di Monte S. Angelo - Via Cintia, Ed. G, I-80126 Napoli, Italy

received 22 June 2005; accepted in final form 25 October 2005
published online 23 November 2005

We comment on the choice of the quintessence potential, examining the slow-roll approximation in a minimally coupled theory of gravity. We make some considerations on the potential behaviors, the related $\Gamma$ parameter, and their relationships to phantom cosmology.

98.80.-k - Cosmology.
98.80.Jk - Mathematical and relativistic aspects of cosmology.
98.80.Cq - Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.).

© EDP Sciences 2005