Spectrum of Curvature Perturbation of Multi-field Inflation with Small-Field Potential
arXiv:0801.3129 · doi:10.1088/1475-7516/2008/02/002
Abstract
In this paper, we have studied the spectrum of curvature perturbation of multi-field inflation with general small-field potential. We assume that the isocurvature perturbation may be neglected, and by using the Sasaki-Stewart formalism, we found that the spectrum may be redder or bluer than of its corresponding single field. The result depends upon the values of fields and their effective masses at the horizon-crossing time. We discuss the relevant cases.
arXiv comment8 pages, no figure, to publish in JCAP
References in corpus (38)
- Particle Physics Models of Inflation and the Cosmological Density Perturbation
- Inflation Dynamics and Reheating
- A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
- Adiabatic and entropy perturbations from inflation
- Assisted inflation
- Primordial non-gaussianities from multiple-field inflation
- Assisted inflation via tachyon condensation
- Correlated adiabatic and isocurvature perturbations from double inflation
- Generalized Assisted Inflation
- Assisted Tachyonic Inflation
- Random Matrices and the Spectrum of N-flation
- Curvature and isocurvature perturbations from two-field inflation in a slow-roll expansion
- M-Theory Inflation from Multi M5-Brane Dynamics
- Inflation models and observation
- Dynamics of Assisted Inflation
- On the Realization of Assisted Inflation
- Correlated perturbations from inflation and the cosmic microwave background
- Assisted Chaotic Inflation in Higher Dimensional Theories
- Quantitative bispectra from multifield inflation
- Nflation: multi-field inflationary dynamics and perturbations
- Dynamical Tuning of the Initial Condition for New Inflation in Supergravity
- Nflation: non-gaussianity in the horizon-crossing approximation
- Multibrane Inflation and Dynamical Flattening of the Inflaton Potential
- Natural Supergravity inflation
- Inflation in large N limit of supersymmetric gauge theories
- On Perturbation Spectra of N-flation
- Generalized Compactification and Assisted Dynamics of Multi--Scalar Field Cosmologies
- Inflation from Tachyon Condensation, Large N Effects
- Dynamics and perturbations in assisted chaotic inflation
- IR Inflation from Multiple Branes
- Modular inflation and the orthogonal axion as curvaton
- Large N Cosmology
- Inflation Assisted by Heterotic Axions
- The Hubble Slow Roll Expansion for Multi Field Inflation
- Nflation: observable predictions from the random matrix mass spectrum
- End of multi-field inflation and the perturbation spectrum
- Assisted Inflation in Randall-Sundrum Scenario
- Instantons, Assisted Inflation and Heterotic M-theory
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- Inflation in a Web
- On Number of Nflation Fields
- Non-gaussianity and Statistical Anisotropy in Cosmological Inflationary Models