Speaker
Dr
Krzysztof Turzynski
(University of Michigan)
Description
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.
Authors
Prof.
David Langlois
(APC and GReCO, Institute d'Astrophysique de Paris)
Dr
Krzysztof Turzynski
(University of Michigan)
Prof.
Stefan Pokorski
(Institute of Theoretical Physics, Warsaw University)
Prof.
Zygmunt Lalak
(Institute of Theoretical Physics, Warsaw University)
