scholarly journals Cosmological perturbations in warm-tachyon inflationary universe model with viscous pressure

2014 ◽  
Vol 736 ◽  
pp. 86-92 ◽  
Author(s):  
M.R. Setare ◽  
V. Kamali
Keyword(s):  
Inflationary Universe ◽  
Universe Model ◽  
Cosmological Perturbations ◽  
Viscous Pressure

scholarly journals R2-Corrections to Chaotic Inflation

2003 ◽  
Vol 18 (29) ◽  
pp. 2039-2049 ◽  
Author(s):  
Víctor H. Cárdenas ◽  
Sergio del Campo ◽  
Ramón Herrera
Keyword(s):  
Early Evolution ◽  
Inflationary Universe ◽  
Universe Model ◽  
Spectral Indices ◽  
Cosmological Perturbations ◽  
Evolution Of The Universe ◽  
Scalar Density ◽  
Higher Derivative ◽  
Derivative Term ◽  
The Universe

Scalar density cosmological perturbations, spectral indices and reheating in a chaotic inflationary universe model, in which a higher derivative term is added, are investigated. This term is supposed to play an important role in the early evolution of the Universe, specifically at times closer to the Planck era.

scholarly journals Inflationary universe model with Ω > 1 and tachyon field

2008 ◽  
Vol 134 ◽  
pp. 012010
Author(s):  
Pedro Labraña ◽  
Leonardo Balart ◽  
Sergio del Campo ◽  
Ramon Herrera
Keyword(s):  
Inflationary Universe ◽  
Universe Model ◽  
Tachyon Field

Cosmological perturbations in the inflationary universe

1987 ◽  
Vol 193 (4) ◽  
pp. 427-432 ◽  
Author(s):  
V.F. Mukhanov ◽  
L.A. Kofman ◽  
D.Yu. Pogosyan
Keyword(s):  
Inflationary Universe ◽  
Cosmological Perturbations

scholarly journals Tachyon-polytropic inflation on the brane

Open Physics ◽  
2013 ◽  
Vol 11 (5) ◽  
Author(s):  
Mohammad Setare ◽  
Vahid Kamali
Keyword(s):  
Equation Of State ◽  
Cosmological Parameters ◽  
High Energy ◽  
Wilkinson Microwave Anisotropy Probe ◽  
Inflationary Universe ◽  
Universe Model ◽  
Exponential Potential ◽  
Energy Limit ◽  
High Energy Limit ◽  
Slow Roll

AbstractWe consider the tachyon-brane inflationary universe model in the context of a polytropic gas equation of state. In slow-roll approximation, we discuss general conditions of this model. For exponential potential, in high-energy limit the characteristics of the model are presented. By using the seven-year Wilkinson Microwave Anisotropy Probe (WMAP7) observational data, we constrain the cosmological parameters of the model.

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