Curvature and isocurvature perturbations in two-field inflation - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Journal of Cosmology and Astroparticle Physics Année : 2007

Curvature and isocurvature perturbations in two-field inflation

Z. Lalak
  • Fonction : Auteur
David Langlois
S. Pokorski
  • Fonction : Auteur
K. Turzynski
  • Fonction : Auteur

Résumé

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.

Dates et versions

in2p3-00145419 , version 1 (10-05-2007)

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Citer

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