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Observational consequences of the Standard Model Higgs inflation variants
cosmic microwave background cosmological parameters early universe infl a-tion observations
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2011/10/10
We consider the possibility to observationally differentiate the Standard Model (SM) Higgs driven inflation with non-minimal couplingto gravity from other variants of SM Higgs inflation based on the s...
Entropic Force Scenarios and Eternal Inflation
Entropic Force Scenarios Eternal Inflation
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2011/10/18
We examine various entropic inflation scenarios, under the light of eternality. After describing the inflation realization and the normal condition for inflation to last at the background level, we in...
Chern-Simons Inflation and Baryogenesis
Chern-Simons Inflation Baryogenesis
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2011/10/18
We propose a model of inflation where the Chern-Simons interaction and vector fields play a central role in generating an inflationary epoch. As a result, in accord with the APS mechanism, the Sakharo...
Unitarizing Higgs Inflation
Unitarizing Higgs Inflation Phenomenology
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2011/1/13
We consider a simple extension of the Standard Model Higgs inflation with one new real scalar field which preserves unitarity up to the Planck scale. The new scalar field (called sigma) completes in ...
Inflation with improved D3-brane potential and the fine tunings associated with the model
improved D3-brane potential the fine tunings associated
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2011/1/13
We investigate brane-antibrane inflation in a warped deformed conifold background that includes contributions to the potential arising from imaginary anti-self-dual (IASD) fluxes including the term wi...
Inflation in string theory: a graceful exit to the real world
Inflation in string theory the real world
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2011/1/13
The most important criteria for a successful inflation are to explain the observed temperature anisotropy in the cosmic microwave background radiation, and exiting inflation in a vacuum where it can ...
Observational signatures of holographic models of inflation
Observational signatures holographic models
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2011/1/13
We discuss the phenomenology of recently proposed holographic models of inflation, in which the very early universe is non-geometric and is described by a dual three-dimensional quantum field theory (...
Curvature Perturbations and non-Gaussianities from Waterfall Phase Transition during Inflation
Curvature Perturbations non-Gaussianities
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2011/1/13
We consider a variant of hybrid inflation where the waterfall phase transition happens during inflation. By adjusting the parameters associated with the mass of the waterfall field, we arrange that t...
Nongaussianity from Particle Production During Inflation
Nongaussianity Particle Production Inflation
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2011/1/11
In a variety of models the motion of the inflaton may trigger the production of some non-inflaton particles during inflation, for example via parametric resonance or a phase transition. Such models ha...
Anisotropic Inflation from Charged Scalar Fields
Anisotropic Inflation Charged Scalar Fields
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2011/1/11
We consider models of inflation with $U(1)$ gauge fields and charged scalar fields including symmetry breaking potential, chaotic inflation and hybrid inflation. We show that there exist attractor sol...
Perturbations and observational aspects of mutated hilltop inflation
observational aspects mutated hilltop inflation
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2011/1/13
We perform a careful investigation of cosmological perturbations and observational aspects, taking mutated hilltop inflation as a representative model. Employing mostly analytical treatment, we derive...
The gravitino problem in supersymmetric warm inflation
gravitino problem supersymmetric warm inflation
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2010/11/16
The warm inflation paradigm considers the continuous production of radiation during inflation
due to dissipative effects. In its strong dissipation limit, warm inflation gives way to a radiation domi...
Enhanced Inflation in the Dirac-Born-Infeld framework
brane inflation DBI theory form invariance symmetry
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2010/11/15
We consider the Einstein equations within the DBI scenario for a spatially flat Friedmann-
Robertson-Walker (FRW) spacetime without a cosmological constant. We derive the inflationary
scenario by ap...
Galilean symmetry in the effective theory of inflation: new shapes of non-Gaussianity
effective theory of inflation new shapes of non-Gaussianity
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2010/11/16
We study the consequences of imposing an approximate Galilean symmetry on the Effective Theory
of Inflation, the theory of small perturbations around the inflationary background. This approach allows...
Optimizing future experimental probes of inflation
Optimizing future experimental probes of inflation
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2010/11/9
The discovery of many novel realizations of the in ationary universe paradigm has led to a degeneracy problem: many di erent in ationary Lagrangians generate the same perturbation spectra.Resolving th...