A Kind of Exact Inflationary Solution in the Chaotic Inflation Model to Non-minimally Coupled Scalar Field

We present a new exact inflationary solution for the chaotic inflation model with non-minimal coupling, by taking the Hubble parameter directly as a function of a scalar field. We then prove that the spectral index of the scalar density fluctuation (and other parameters), which derived from the exact inflationary solution, is exactly consistent with recent astronomical observations.

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CHAOTIC INFLATION ON THE RANDALL–SUNDRUM TWO-BRANE MODEL

Modern Physics Letters A ◽

10.1142/s0217732310034183 ◽

2010 ◽

Vol 25 (31) ◽

pp. 2697-2713

Author(s):

KOUROSH NOZARI ◽

SIAMAK AKHSHABI

Keyword(s):

Scalar Field ◽

Field Potential ◽

Friedmann Equation ◽

Warp Factor ◽

Model Parameters ◽

Stabilization Mechanism ◽

Brane Model ◽

Inflation Model ◽

Bulk Scalar Field ◽

Chaotic Inflation

We construct an inflation model on the Randall–Sundrum I (RSI) brane where a bulk scalar field stabilizes the inter-brane separation. We study impact of the bulk scalar field on the inflationary dynamics on the brane. We proceed in two different approaches: in the first approach, the stabilizing field potential is directly appeared in the Friedmann equation and the resulting scenario is effectively a two-field inflation. In the second approach, the stabilization mechanism is considered in the context of a warp factor so that there is just one field present that plays the roles of both inflaton and stabilizer. We study constraints imposed on the model parameters from recent observations.

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Favored Inflationary Models by Scalar Field Condensate Baryogenesis

Galaxies ◽

10.3390/galaxies9030049 ◽

2021 ◽

Vol 9 (3) ◽

pp. 49

Author(s):

Daniela Kirilova ◽

Mariana Panayotova

Keyword(s):

Scalar Field ◽

Baryon Asymmetry ◽

Inflationary Model ◽

Inflation Model ◽

Low Energies ◽

Inflationary Models ◽

Chaotic Inflation

We calculate the baryon asymmetry value generated in the Scalar Field Condensate (SCF) baryogenesis model obtained in several inflationary scenarios and different reheating models. We provide analysis of the baryon asymmetry value obtained for more than 70 sets of parameters of the SCF model and the following inflationary scenarios, namely: new inflation, chaotic inflation, Starobinsky inflation, MSSM inflation, quintessential inflation. We considered both cases of efficient thermalization after inflation and delayed thermalization. We have found that the SFC baryogenesis model produces baryon asymmetry orders of magnitude bigger than the observed one for the following inflationary models: new inflation, new inflation model by Shafi and Vilenkin, MSSM inflation, chaotic inflation with high reheating temperature and the simplest Shafi–Vilenkin chaotic inflationary model. Strong diluting mechanisms are needed for these models to reduce the resultant baryon excess at low energies to its observational value today. We have found that a successful generation of the observed baryon asymmetry is possible by the SCF baryogenesis model in Modified Starobinsky inflation, chaotic inflation with low reheating temperature, chaotic inflation in SUGRA, and Quintessential inflation.

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Lower bound of the tensor-to-scalar ratior≳0.1in a nearly quadratic chaotic inflation model in supergravity

Physics Letters B ◽

10.1016/j.physletb.2014.12.053 ◽

2015 ◽

Vol 741 ◽

pp. 267-271 ◽

Cited By ~ 7

Author(s):

Keisuke Harigaya ◽

Masahiro Kawasaki ◽

Tsutomu T. Yanagida

Keyword(s):

Lower Bound ◽

Inflation Model ◽

Chaotic Inflation

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LARGE NON-GAUSSIANITY FROM MULTI-BRID INFLATION

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194511000146 ◽

2011 ◽

Vol 01 ◽

pp. 108-113

Author(s):

ATSUSHI NARUKO ◽

MISAO SASAKI

Keyword(s):

Scalar Field ◽

General Feature ◽

Present Model ◽

The Other ◽

Model Parameters ◽

Exponential Potential ◽

Inflation Model ◽

Hybrid Inflation ◽

Non Gaussian ◽

Near Future

A model of multi-component hybrid inflation, dubbed multi-brid inflation, which may yield a large non-Gaussian paramter fNL, was proposed recently. In particular, for a two-brid inflation model with an exponential potential and the condition that the end of inflation is an ellipse in the field space, it was found that, while keeping the other observational quantities within the range consistent with observations, large non-Gaussianity is possible for certain inflationary trajectories. In this talk, in order to see if this result is a general feature of multi-brid inflation, we consider a model with a potential with an exponent quadratic in the scalar field components. We also consider a more general class of ellipses for the end of inflation. Focusing on the case of two-brid inflation, we find that large non-Gaussianity is also possible in the present model. Then by tuning the model parameters, we find that there exist models for which both the non-Gaussianity and the tensor-to-scalar ratio are large enough to be detected in the very near future.

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D-TERM CHAOTIC INFLATION IN SUPERGRAVITY

International Journal of Modern Physics A ◽

10.1142/s0217751x08041128 ◽

2008 ◽

Vol 23 (14n15) ◽

pp. 2287-2288

Author(s):

MASAHIDE YAMAGUCHI ◽

KENJI KADOTA

Keyword(s):

Model Building ◽

Initial Condition ◽

Inflation Model ◽

New Perspective ◽

Chaotic Inflation

Even though the chaotic inflation is one of the most popular inflation models for its simple dynamics and compelling resolutions to the initial condition problems, its realization in supergravity has been considered a challenging task. We discuss how the chaotic inflation dominated by the D-term can be induced in supergravity, which would give a new perspective on the inflation model building in supergravity.

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TRANS-PLANCKIAN PHYSICS AND NON-COMMUTATIVE INFLATION

Modern Physics Letters A ◽

10.1142/s0217732308027990 ◽

2008 ◽

Vol 23 (17n20) ◽

pp. 1598-1605 ◽

Cited By ~ 1

Author(s):

SEOKTAE KOH

Keyword(s):

Scalar Field ◽

Thermal Radiation ◽

Spectral Index ◽

Planck Scale ◽

Dispersion Relations ◽

Scale Invariant ◽

Inflation Model

Non-commutativity of spacetime at the Planck scale may deform the usual dispersion relations. And these deformed dispersion relations could lead to the accelerating phase without a scalar field. In this paper, we have calculated the spectral index and the running of spectral index in a non-commutative inflation model. Non-commutative inflation with thermal radiation gives a scale invariant spectrum in the limit w → −1 and negative running spectral index which are consistent with the WMAP 3-year results.

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CMBR constraints on an inflation model with nonminimal scalar field

10.1063/1.1363537 ◽

2001 ◽

Cited By ~ 1

Author(s):

Hyerim Noh

Keyword(s):

Scalar Field ◽

Inflation Model

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Warm Inflation with Nonminimal Derivative Coupling

Advances in High Energy Physics ◽

10.1155/2014/343819 ◽

2014 ◽

Vol 2014 ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

Kourosh Nozari ◽

M. Shoukrani ◽

N. Rashidi

Keyword(s):

Scalar Field ◽

Observational Data ◽

Kinetic Term ◽

Model Parameters ◽

Detailed Calculation ◽

Data Set ◽

Derivative Coupling ◽

Warm Inflation ◽

Inflation Model ◽

Planck Satellite

We study the effects of the nonminimal derivative coupling on the dissipative dynamics of the warm inflation where the scalar field is nonminimally coupled to gravity via its kinetic term. We present a detailed calculation of the cosmological perturbations in this setup. We use the recent observational data from the joint data set of WMAP9 + BAO +H0and also the Planck satellite data to constrain our model parameters for natural and chaotic inflation potentials. We study also the levels of non-Gaussianity in this warm inflation model and we confront the result with recent observational data from the Planck satellite.

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Will Quantum Cosmology Resurrect Chaotic Inflation Model?

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194516602052 ◽

2016 ◽

Vol 43 ◽

pp. 1660205 ◽

Cited By ~ 2

Author(s):

Sang Pyo Kim ◽

Won Kim

Keyword(s):

Wave Function ◽

Quantum Cosmology ◽

Quantum Corrections ◽

Inflation Model ◽

Starobinsky Model ◽

Curvature Term ◽

Single Field ◽

Viable Model ◽

De Broglie Bohm ◽

Chaotic Inflation

The single field chaotic inflation model with a monomial power greater than one seems to be ruled out by the recent Planck and WMAP CMB data while Starobinsky model with a higher curvature term seems to be a viable model. Higher curvature terms being originated from quantum fluctuations, we revisit the quantum cosmology of the Wheeler-DeWitt equation for the chaotic inflation model. The semiclassical cosmology emerges from quantum cosmology with fluctuations of spacetimes and matter when the wave function is peaked around the semiclassical trajectory with quantum corrections a la the de Broglie-Bohm pilot theory.

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