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Black hole production in tachyonic preheating
Teruaki Suyama, Takahiro Tanaka, Bruce Bassett +1
We present fully non-linear simulations of a self-interacting scalar field in the early universe undergoing tachyonic preheating. We find that density perturbations on sub-horizon…
Are black holes over-produced during preheating?
Teruaki Suyama, Takahiro Tanaka, Bruce Bassett +1
We provide a simple but robust argument that primordial black hole (PBH) production generically does {\em not} exceed astrophysical bounds during the resonant preheating phase afte…
Fermion production from preheating-amplified metric perturbations
Bruce A. Bassett, Marco Peloso, Lorenzo Sorbo +1
We study gravitational creation of light fermions in the presence of classical scalar metric perturbations about a flat Friedmann-Lemaitre- Robertson-Walker (FLRW) background. Thes…
Inflationary preheating and primordial black holes
Bruce A. Bassett, Shinji Tsujikawa
Preheating after inflation may over-produce primordial black holes (PBH's) in many regions of parameter space. As an example we study two-field models with a massless self-interact…
Multi-field fermionic preheating
Shinji Tsujikawa, Bruce A. Bassett, Fermin Viniegra
Fermion creation during preheating in the presence of multiple scalar fields exhibits a range of interesting behaviour relevant to estimating post-inflation gravitino abundances. W…
Chaotic inflation on the brane
R Maartens, D Wands, B Bassett +1
We consider slow-roll inflation in the context of recently proposed four-dimensional effective gravity induced on the world-volume of a three-brane in five-dimensional Einstein gra…
Restoring the sting to metric preheating
Bruce A. Bassett, Christopher Gordon, Roy Maartens +1
The relative growth of field and metric perturbations during preheating is sensitive to initial conditions set in the preceding inflationary phase. Recent work suggests this may pr…
Massless Metric Preheating
Bruce A. Bassett, F. Viniegra
Can super-Hubble metric perturbations be amplified exponentially during preheating ? Yes. An analytical existence proof is provided by exploiting the conformal properties of massle…
Metric preheating and limitations of linearized gravity
Bruce A. Bassett, Fabrizio Tamburini, David I. Kaiser +1
Recently it has become clear that the resonant amplification of quantum field fluctuations at preheating must be accompanied by resonant amplification of scalar metric perturbation…
General Relativistic effects in preheating
Bruce A. Bassett, David I. Kaiser, Roy Maartens
General relativistic effects in the form of metric perturbations are usually neglected in the preheating era that follows inflation. We argue that in realistic multi-field models t…
Inflationary Reheating in Grand Unified Theories
Bruce A. Bassett, Fabrizio Tamburini
Grand unified theories may display multiply interacting fields with strong coupling dynamics. This poses two new problems: (1) What is the nature of chaotic reheating after inflati…
Inflationary Reheating Classes via Spectral Methods
Bruce A. Bassett
Inflationary reheating is almost completely controlled by the Floquet indices, . Using spectral theory we demonstrate that the stability bands (where ) of the Mathieu…
Geometric Reheating after Inflation
Bruce A. Bassett, Stefano Liberati
Inflationary reheating via resonant production of non-minimally coupled scalar particles with only gravitational coupling is shown to be extremely strong, exhibiting a negative cou…
The Preheating - Gravitational Wave Correspondence
Bruce A. Bassett
The gravitational wave equations form a parametric resonance system during oscillatory reheating after inflation, when cast in terms of the electric and magnetic parts of the Weyl…