Skip to Main content Skip to Navigation
Journal articles

Curvature and isocurvature perturbations in two-field inflation

Z. Lalak David Langlois 1 S. Pokorski K. Turzynski
APC (UMR_7164) - AstroParticule et Cosmologie, Institut für theoretische Physik
Abstract : We study cosmological perturbations in two-field inflation, allowing for non-standard kinetic terms. We calculate analytically the spectra of curvature and isocurvature modes at Hubble crossing, up to first order in the slow-roll parameters. We also compute numerically the evolution of the curvature and isocurvature modes from well within the Hubble radius until the end of inflation. We show explicitly for a few examples, including the recently proposed model of 'roulette' inflation, how isocurvature perturbations affect significantly the curvature perturbation between Hubble crossing and the end of inflation.
Complete list of metadata
Contributor : Simone Lantz Connect in order to contact the contributor
Submitted on : Thursday, May 10, 2007 - 11:21:49 AM
Last modification on : Wednesday, October 21, 2020 - 4:32:14 PM

Links full text



Z. Lalak, David Langlois, S. Pokorski, K. Turzynski. Curvature and isocurvature perturbations in two-field inflation. Journal of Cosmology and Astroparticle Physics, Institute of Physics (IOP), 2007, 07, pp.014. ⟨10.1088/1475-7516/2007/07/014⟩. ⟨in2p3-00145419⟩



Record views