77 citations · 284 across the 11 of their papers we have counts for
11 papers
Observational signatures of a non-singular bouncing cosmology
Marc Lilley, Larissa Lorenz, Sebastien Clesse
We study a cosmological scenario in which inflation is preceded by a bounce. In this scenario, the primordial singularity, one of the major shortcomings of inflation, is replaced b…
Stochastic Inflation in Compact Extra Dimensions
Larissa Lorenz
While moving down the potential on its classical slow roll trajectory, the inflaton field is subject to quantum jumps, which take it up or down the potential at random. In "stochas…
Geometrically Consistent Approach to Stochastic DBI Inflation
Larissa Lorenz, Jerome Martin, Jun'ichi Yokoyama
Stochastic effects during inflation can be addressed by averaging the quantum inflaton field over Hubble-patch sized domains. The averaged field then obeys a Langevin-type equation…
Primordial Fluctuations in String Cosmology
Larissa C. Lorenz
This thesis is dedicated to the study of inflationary scenarios based on string theory. Inflation is a brief period of accelerated expansion in the very early Universe which gives…
Reheating in a Brane Monodromy Inflation Model
Robert H. Brandenberger, Anke Knauf, Larissa C. Lorenz
We study reheating in a recently proposed brane "monodromy inflation" model in which the inflaton is the position of a D4 brane on a "twisted torus". Specifically, we study the rep…
Constraints on Kinetically Modified Inflation from WMAP5
Larissa Lorenz, Jerome Martin, Christophe Ringeval
Single field inflationary models with a non-minimal kinetic term (also called k-inflationary models) can be characterised by the so-called sound flow functions, which complete the…