Warm modified Chaplygin gas shaft inflation

Jawad, Abdul; Ilyas, Amara; Rani, Shamaila

doi:10.1140/epjc/s10052-017-4691-2

Cited by 7 publications

(5 citation statements)

References 74 publications

(65 reference statements)

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“…In Refs. [43,44], the authors have developed inflationary parameters by considering a shaft potential and a tachyon scalar field and found that their results are consistent with current observational data. Recently, Kobayashi and Seto [45] investigated the polynomial warm inflation and reported that their results are in consistence with BICEP2 and Planck data.…”

Section: Introductionsupporting

confidence: 58%

Dynamics of polynomial Chaplygin gas warm inflation

Jawad

Chaudhary²,

Videla

2017

Eur. Phys. J. C

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In the present work, we study the consequences of a recently proposed polynomial inflationary potential in the context of the generalized, modified, and generalized cosmic Chaplygin gas models. In addition, we consider dissipative effects by coupling the inflation field to radiation, i.e., the inflationary dynamics is studied in the warm inflation scenario. We take into account a general parametrization of the dissipative coefficient for describing the decay of the inflaton field into radiation. By studying the background and perturbative dynamics in the weak and strong dissipative regimes of warm inflation separately for the positive and negative quadratic and quartic potentials, we obtain expressions for the most relevant inflationary observables as the scalar power spectrum, the scalar spectral, and the tensor-to-scalar ratio. We construct the trajectories in the n s -r plane for several expressions of the dissipative coefficient and compare with the two-dimensional marginalized contours for (n s , r ) from the latest Planck data. We find that our results are in agreement with WMAP9 and Planck 2015 data.

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Section: Introductionsupporting

confidence: 58%

Dynamics of polynomial Chaplygin gas warm inflation

Jawad

Chaudhary²,

Videla

2017

Eur. Phys. J. C

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“…They studied the model for various types of Ω (dissipation parameter) and ξ (bulk parameter) and reported that the scalar spectral index (n s ) lies in the compatible range for less number of e-folds (N). The authors in [38] investigated the polynomial WI and confirmed the consistency of their results with recent astrophysical data. Sadjadi and Goodarzi [39] discussed oscillatory type of inflation with non-minimal kinetic coupling as a resolution of few number of e-folds ("non-minimal derivative coupling model [40]").…”

Section: Introductionsupporting

confidence: 63%

Inflationary solution of Hamilton Jacobi equations during weak dissipative regime

Saleem

Zubair

2020

Phys. Scr.

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In this paper, an elegant mathematical approach is introduced to solve the equations of warm inflationary model without using extra approximations other than slow-roll. This important inflationary method known as Hamilton-Jacobian formalism. Here tachyon field and the imperfect fluid are considered to be the cosmic ingredients to create inflation. A general formalism is developed for the considered inflationary model and further work is restricted to weak dissipative regime. A detailed analysis of the model is presented for three different choices of bulk and dissipative coefficients taking as constant as well as variable (function of Hubble parameter and inflaton). In each case, the involved model parameters are constrained to plot the physical acceptable range of scalar spectral index and tensor to scalar ratio. The parametric trajectories proved that the acquired results for all the three cases are compatible with Planck astrophysical data. Furthermore, the existence of warm inflation and slow-roll limit are also verified graphically.

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“…We will choose m 10 18 GeV in our calculations. (See also [20] for a study of shaft inflaton potential in a warm inflation scenario. )…”

Section: Shaft Inflation In 4d Spacetimementioning

confidence: 99%

Shaft inflation in Randall-Sundrum model

Loc¹

2023

J. Cosmol. Astropart. Phys.

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Shaft inflation is a model in which the inflaton potential approaches a plateau far from the origin, while it mimics chaotic inflation near the origin. Meanwhile, the Randall-Sundrum type II model (RSII) is an interesting extra-dimensional model to study cosmological phenomenology. In this paper, we study shaft inflation in the RSII model. We find that the predictions are in excellent agreement with observation. The fundamental five-dimensional Planck scale is found to be M 5 ≃ 1016 GeV, which is consistent with the lower bound M 5 ≳ 109 GeV obtained from experimental Newtonian gravitational bound. This is an important result that can be used to explore further the implications of extra dimension in other contexts.

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Warm modified Chaplygin gas shaft inflation

Cited by 7 publications

References 74 publications

Dynamics of polynomial Chaplygin gas warm inflation

Dynamics of polynomial Chaplygin gas warm inflation

Inflationary solution of Hamilton Jacobi equations during weak dissipative regime

Shaft inflation in Randall-Sundrum model

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