359 citations · 1.5k across the 52 of their papers we have counts for
6 papers · 2 filters
The exponential tail of inflationary fluctuations: consequences for primordial black holes
Jose María Ezquiaga, Juan García-Bellido, Vincent Vennin
The curvature perturbations produced during an early era of inflation are known to have quasi-Gaussian distribution functions close to their maximum, where they are well constraine…
Canonical transformations and squeezing formalism in cosmology
Julien Grain, Vincent Vennin
Canonical transformations are ubiquitous in Hamiltonian mechanics, since they not only describe the fundamental invariance of the theory under phase-space reparameterisations, but…
Primordial black holes from the preheating instability
Jerome Martin, Theodoros Papanikolaou, Vincent Vennin
After the end of inflation, the inflaton field oscillates around a local minimum of its potential and decays into ordinary matter. These oscillations trigger a resonant instability…
Stochastic inflation beyond slow roll
Chris Pattison, Vincent Vennin, Hooshyar Assadullahi +1
We study the stochastic formalism of inflation beyond the usual slow-roll approximation. We verify that the assumptions on which the stochastic formalism relies still hold even far…
Inflation after Planck: Judgment Day
Debika Chowdhury, Jerome Martin, Christophe Ringeval +1
Inflation is considered as the best theory of the early universe by a very large fraction of cosmologists. However, the validity of a scientific model is not decided by counting th…
On backreaction effects in geometrical destabilisation of inflation
Oskar Grocholski, Marcin Kalinowski, Maciej Kolanowski +3
We study the geometrical instability arising in multi-field models of inflation with negatively-curved field space. We analyse how the homogeneous background evolves in presence of…