Can Phantom-Dominated Universe Decelerate Also in Future ?
| dc.creator | Srivastava, S. K. | |
| dc.date | 2007-07-10 | |
| dc.date | 2008-01-02 | |
| dc.date.accessioned | 2026-07-07T08:51:41Z | |
| dc.date.available | 2026-07-07T08:51:41Z | |
| dc.description | Here Randall-Sundrum brane-gravity models of the homogeneous and flat universe, dominated by phantom fluid, is considered. It is noted that brane-gravity corrections effect the behaviour of phantom fluid in RS-II model (where brane-tension $λ$ is negative) drastically. It is interesting to see that, phantom fluid violates the weak energy condition (WEC) till energy density $ρ< λ$, but when phantom energy density $ρ$ grows more, the effective equation of state does not violate WEC. Moreover, with increasing phantom energy density, a stage comes when even strong energy condition is not violated due to effect of these corrections. Also expansion stops, when $ρ= 2 λ$. As a consequence, RS-II phantom universe accelerates upto a finite time explaining the present cosmic acceleration, but it decelerates later.Thus, RS-II phantom universe is singularity-free. In the case of RS-I model, where $λ$ is positive, characteristics of phantom fluid is not suppressed by brane-corrections and phantom universe accelerates ending up in big-rip singularity in finite future time. | |
| dc.description | 17 pages | |
| dc.identifier | https://arxiv.org/abs/0707.1376 | |
| dc.identifier | http://arxiv.org/abs/0707.1376 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/145022 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Can Phantom-Dominated Universe Decelerate Also in Future ? | |
| dc.type | text |