219 citations · 463 across the 7 of their papers we have counts for
5 papers · 1 filter
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…
Kaluza-Klein braneworld cosmology with static internal dimensions
Sugumi Kanno, David Langlois, Misao Sasaki +1
We investigate the Kaluza-Klein braneworld cosmology from the point of view of observers on the brane. We first generalize the Shiromizu-Maeda-Sasaki (SMS) equations to higher dime…
Cosmological evolution of regularized branes in 6D warped flux compactifications
Masato Minamitsuji, David Langlois
We study the cosmological evolution of extended branes in 6D warped flux compactification models. The branes are endowed with the three ordinary spatial dimensions, which are assum…
Inflation, quantum fluctuations and cosmological perturbations
David Langlois
These lectures are intended to give a pedagogical introduction to the main current picture of the very early universe. After elementary reviews of general relativity and of the sta…