106 citations · 317 across the 7 of their papers we have counts for
7 papers
Properties of oscillons in hilltop potentials: energies, shapes, and lifetimes
Stefan Antusch, Francesco Cefala, Francisco Torrenti
Oscillons are spatially localised strong fluctuations of a scalar field. They can e.g. form after inflation when the scalar field potential is shallower than quadratic away from th…
What can we learn from the stochastic gravitational wave background produced by oscillons?
Stefan Antusch, Francesco Cefala, Stefano Orani
The stochastic gravitational wave (GW) background provides a fascinating window to the physics of the very early universe. Beyond the nearly scale-invariant primordial GW spectrum…
Oscillons from String Moduli
Stefan Antusch, Francesco Cefala, Sven Krippendorf +3
A generic feature of string compactifications is the presence of many scalar fields, called moduli. Moduli are usually displaced from their post-inflationary minimum during inflati…
Gravitational waves from oscillons after inflation
Stefan Antusch, Francesco Cefala, Stefano Orani
We investigate the production of gravitational waves during preheating after inflation in the common case of field potentials that are asymmetric around the minimum. In particular,…
Parametric resonance after hilltop inflation caused by an inhomogeneous inflaton field
Stefan Antusch, Francesco Cefala, David Nolde +1
We study preheating after hilltop inflation where the inflaton couples to another scalar field, e.g. a right-handed sneutrino, which provides a mechanism for generating the correct…
False vacuum energy dominated inflation with large and the importance of
Stefan Antusch, Francesco Cefala, David Nolde +1
We investigate to which extent and under which circumstances false vacuum energy () dominated slow-roll inflation is compatible with a large tensor-to-scalar ratio $r = O(0.1)…
SUGRA New Inflation with Heisenberg Symmetry
Stefan Antusch, Francesco Cefala
We propose a realisation of 'new inflation' in supergravity (SUGRA), where the flatness of the inflaton potential is protected by a Heisenberg symmetry. Inflation can be associated…