Cardy-Verlinde Entropy Formula in the Presence of a General Cosmological State Equation
| dc.creator | Brevik, I. | |
| dc.date | 2002-04-04 | |
| dc.date.accessioned | 2026-07-07T12:29:07Z | |
| dc.date.available | 2026-07-07T12:29:07Z | |
| dc.description | As recently found by Youm [hep-th/0201268], the entropy of the universe will no longer be expressible in the conventional Cardy-Verlinde form if one relaxes the radiation dominance state equation and instead assumes a more general equation of the form p=(γ-1)ρ, with γa constant. We show that Youm's generalized entropy formula remains valid when the cosmic fluid is no longer ideal, but is allowed to possess a constant bulk viscosity ζ. We supply our analysis with some numerical estimates, thus calculating the scale factor a(t) for a k=0 universe, and also calculate via a perturbative expansion in ζthe magnitude of the viscosity-induced correction to the scale factor if the universe is radiation dominated. | |
| dc.description | 10 pages, LaTeX, no figures | |
| dc.identifier | https://arxiv.org/abs/gr-qc/0204021 | |
| dc.identifier | http://arxiv.org/abs/gr-qc/0204021 | |
| dc.identifier | Phys.Rev.D65:127302,2002 | |
| dc.identifier | doi:10.1103/PhysRevD.65.127302 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215770 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Cardy-Verlinde Entropy Formula in the Presence of a General Cosmological State Equation | |
| dc.type | text |