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

2015 ◽  
Vol 741 ◽  
pp. 267-271 ◽  
Author(s):  
Keisuke Harigaya ◽  
Masahiro Kawasaki ◽  
Tsutomu T. Yanagida
Keyword(s):  
Lower Bound ◽  
Inflation Model ◽  
Chaotic Inflation

scholarly journals CHAOTIC INFLATION ON THE RANDALL–SUNDRUM TWO-BRANE MODEL

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.

D-TERM CHAOTIC INFLATION IN SUPERGRAVITY

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.

scholarly journals Will Quantum Cosmology Resurrect Chaotic Inflation Model?

2016 ◽  
Vol 43 ◽  
pp. 1660205 ◽  
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.

CHAOTIC INFLATION IN SUPERGRAVITY

2008 ◽  
Vol 23 (17n20) ◽  
pp. 1536-1543
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.

NATURAL CHAOTIC INFLATION MODEL IN SUPERGRAVITY

COSMO-2000 ◽  
2001 ◽  
Author(s):  
MASAHIDE YAMAGUCHI ◽  
M. KAWASAKI ◽  
T. YANAGIDA ◽  
JUN'ICHI YOKOYAMA
Keyword(s):  
Inflation Model ◽  
Chaotic Inflation

scholarly journals Revisiting the minimal chaotic inflation model

2016 ◽  
Vol 756 ◽  
pp. 113-117 ◽  
Author(s):  
Keisuke Harigaya ◽  
Masahiro Ibe ◽  
Masahiro Kawasaki ◽  
Tsutomu T. Yanagida
Keyword(s):  
Inflation Model ◽  
Chaotic Inflation

Exact inflationary solution in the chaotic inflation model to non-minimally coupled scalar field

2009 ◽  
Vol 87 (11) ◽  
pp. 1181-1184
Author(s):  
Shiwu Chen ◽  
Xizhun Hao ◽  
Xiongwei Liu ◽  
Shuzheng Yang
Keyword(s):  
Scalar Field ◽  
Spectral Index ◽  
Hubble Parameter ◽  
Density Fluctuation ◽  
Minimal Coupling ◽  
Astronomical Observations ◽  
Scalar Density ◽  
Inflation Model ◽  
Exact Inflationary Solution ◽  
Chaotic Inflation

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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