Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-05-24
JCAP0809:028,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
[7 pages, no figure, more reference added, accepted by JCAP]
Scientific paper
10.1088/1475-7516/2008/09/028
Aspects of non-linear Schr\"{o}dinger-type (NLS) formulation of scalar (phantom) field cosmology on slow-roll, acceleration, WKB approximation and Big Rip singularity are presented. Slow-roll parameters for the curvature and barotropic density terms are introduced. We reexpress all slow-roll parameters, slow-roll conditions and acceleration condition in NLS form. WKB approximation in the NLS formulation is also discussed when simplifying to linear case. Most of the Schr\"{o}dinger potentials in NLS formulation are very slowly-varying, hence WKB approximation is valid in the ranges. In the NLS form of Big Rip singularity, two quantities are infinity in stead of three. We also found that approaching the Big Rip, $w_{\rm eff}\to -1 + {2}/{3q}$, $(q<0)$ which is the same as effective phantom equation of state in the flat case.
No associations
LandOfFree
Slow-roll, acceleration, the Big Rip and WKB approximation in NLS-type formulation of scalar field cosmology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Slow-roll, acceleration, the Big Rip and WKB approximation in NLS-type formulation of scalar field cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slow-roll, acceleration, the Big Rip and WKB approximation in NLS-type formulation of scalar field cosmology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-437290