On the Equation of State for Scalar Field
| dc.creator | Silbergleit, A. S. | |
| dc.date | 2002-08-27 | |
| dc.date.accessioned | 2026-07-07T02:04:49Z | |
| dc.date.available | 2026-07-07T02:04:49Z | |
| dc.description | We consider Friedmann cosmologies with minimally coupled scalar field. Exact solutions are found, many of them elementary, for which the scalar field energy density, rho_f, and pressure, p_f, obey the equation of state (EOS) p_f=w_fρ_f. For any constant |w_f|<1 there exists a two-parameter family of potentials allowing for such solutions; the range includes, in particular, the quintessence (-1<w_f<0) and `dust' (w_f=0). The potentials are monotonic and behave either as a power or as an exponent for large values of the field. For a class of potentials satisfying certain inequalities involving their first and second logarithmic derivatives, the EOS holds in which w_f=w_f(\f) varies with the field slowly, as compared to the potential. | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0208481 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0208481 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/4905 | |
| dc.subject | Astrophysics | |
| dc.title | On the Equation of State for Scalar Field | |
| dc.type | text |