Chaplygin inspired inflation

Bertolami, Orfeu; Duvvuri, Vikram

doi:10.1016/j.physletb.2006.08.025

Cited by 57 publications

(80 citation statements)

References 43 publications

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“…(32) and (33), we can analytically solve α and K in terms of , R , V , and λ as ( * ) = 0 017, we can obtain a lower limit for V 3 λ when the cosmological scales exit the horizon λV 3 > 1 9 × 10 −6 (37) where κ = 1.…”

Section: Exponential Potentialmentioning

confidence: 99%

“…In the present work we initiate tachyoninflation model by using the polytropic equation of state. Previously, chaotic inflation in the context a phenomenological modification of gravity inspired by the Chaplygin gas equation of state, has been studied by Bertolami et al [32]. According to this model, the scalar field which drives inflation is the standard inflaton field, which can be extrapolated for obtaining a successful inflation period with a Chaplygin gas model.…”

Section: Introductionmentioning

confidence: 99%

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Tachyon-polytropic inflation on the brane

Setare

Kamali

2013

Open Physics

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Abstract:We 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. PACS (2008):

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Section: Exponential Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tachyon-polytropic inflation on the brane

Setare

Kamali

2013

Open Physics

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“…where ρ m is the matter energy density [22]. The dynamics of the cosmological model in the warm polytropic inflationary scenario is given bÿ…”

Section: Friedmann Equation Asmentioning

confidence: 99%

“…Previously chaotic inflation in the context a phenomenological modification of gravity inspired by the Chaplygin gas equation of state has been studied by Bertolami et al [22].…”

Section: Introductionmentioning

confidence: 99%

Warm-Polytropic Inflationary Universe Model

Setare

Houndjo

Kamali

2013

Int. J. Mod. Phys. D

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In the present paper we study warm inflationary universe models in the context of a polytropic gas. We derive the characteristics of this model in slow-roll approximation and develop our model in two cases, 1-For a constant dissipative parameter Γ. 2-Γ as a function of scalar field φ. In these cases we will obtain exact solution for the scalar field and Hubble parameter. We will also obtain explicit expressions for the tensor-scalar ratio R, scalar spectrum index n s and its running α s , in slow-roll approximation.

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“…However, we should emphasize that our inflationary model is not presented as a more desirable alternative to the conventional ones. Rather, we merely aim to establish the assumptions and extrapolations required to obtain successful inflation in a Chaplygin inspired model [61].…”

Section: Introductionmentioning

confidence: 99%

Impact of generalized dissipative coefficient on warm inflationary dynamics in the light of latest Planck data

Jawad

Hussain²,

Rani

et al. 2017

Eur. Phys. J. C

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The warm inflation scenario in view of the modified Chaplygin gas is studied. We consider the inflationary expansion to be driven by a standard scalar field whose decay ratio has a generic power-law dependence with the scalar field φ and the temperature of the thermal bath T . By assuming an exponential power-law dependence in the cosmic time for the scale factor a(t), corresponding to the intermediate inflation model, we solve the background and perturbative dynamics considering our model to evolve according to (1) weak dissipative regime and (2) strong dissipative regime. Specifically, we find explicit expressions for the dissipative coefficient, scalar potential, and the relevant inflationary observables like the scalar power spectrum, scalar spectral index, and tensor-to-scalar ratio. The free parameters characterizing our model are constrained by considering the essential condition for warm inflation, the conditions for the model evolves according to weak or strong dissipative regime, and the 2015 Planck results through the n s -r plane.

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Chaplygin inspired inflation

Cited by 57 publications

References 43 publications

Tachyon-polytropic inflation on the brane

Tachyon-polytropic inflation on the brane

Warm-Polytropic Inflationary Universe Model

Impact of generalized dissipative coefficient on warm inflationary dynamics in the light of latest Planck data

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