401 citations · 3.9k across the 71 of their papers we have counts for
3 papers · 1 filter
Primordial perturbations and non-Gaussianities in DBI and general multi-field inflation
David Langlois, Sebastien Renaux-Petel, Daniele A. Steer +1
We study cosmological perturbations in general inflation models with multiple scalar fields and arbitrary kinetic terms, with special emphasis on the multi-field extension of Dirac…
Primordial fluctuations and non-Gaussianities in multi-field DBI inflation
David Langlois, Sebastien Renaux-Petel, Daniele A. Steer +1
We study Dirac-Born-Infeld (DBI) inflation models with multiple scalar fields. We show that the adiabatic and entropy modes propagate with a common effective sound speed and are th…
Perturbations in generalized multi-field inflation
David Langlois, Sébastien Renaux-Petel
We study the linear perturbations of multi-field inflationary models governed by a Lagrangian which is a general function of the scalar fields and of a global kinetic term combinin…