Modulated inflation from the kinetic term

2008/04/30 by Tomohiro Matsuda · 11 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmological perturbation theory #Cosmology and Gravitation Theories #Inflation (cosmology) #Kinetic energy #Kinetic term #Mixing (physics) #Perturbation (astronomy) #Statistical Mechanics and Entropy #astro-ph #hep-ph #hep-th

paper · pdf · doi:10.1088/1475-7516/2008/05/022

published in Journal of Cosmology and Astroparticle Physics 2008(05), 022 (Institute of Physics) · 15 pages, 1 figure, Accepted for publication in JCAP

arxiv created 2008/05/03 · openalex publication_date 2008/05/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study modulated inflation from the kinetic term. Using the Mukhanov–Sasaki variable, it is possible to determine how mixing induced by the kinetic term feeds the curvature perturbation with the isocurvature perturbation. We show explicitly that the analytic result obtained from the evolution of the Mukhanov–Sasaki variable is consistent with the δ N -formula. From our results, we find analytic conditions for the modulated fluctuation and the non-Gaussianity parameter.

Citations

• Modulated fluctuations from hybrid inflation
• Generating the curvature perturbation without an inflaton
• Inflationary models inducing non-Gaussian metric fluctuations
• Mach's Principle and a Relativistic Theory of Gravitation
• Elliptic inflation: generating the curvature perturbation without slow-roll
• Boundary inflation and the WMAP data
• Hybrid curvatons from broken symmetry
• Generating the Curvature Perturbation at the End of Inflation in String Theory
• Hybrid inflation without flat directions and without primordial black holes
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Cosmological perturbations from varying masses and couplings