100 citations · 398 across the 14 of their papers we have counts for
5 papers · 1 filter
Super-horizon cosmic string correlations
Arttu Rajantie
When gauged cosmic strings form in a symmetry-breaking phase transition, the gauge field configuration at the time becomes imprinted in the spatial string distribution by the flux…
Non-Gaussianity from massless preheating
Alex Chambers, Arttu Rajantie
Preheating can convert superhorizon fluctuations of light scalar fields present at the end of inflation into observable density perturbations. We show in detail how lattice field t…
Lattice calculation of non-Gaussianity from preheating
Alex Chambers, Arttu Rajantie
If light scalar fields are present at the end of inflation, their non-equilibrium dynamics such as parametric resonance or a phase transition can produce non-Gaussian density pertu…
The end of locked inflation
E. J. Copeland, A. Rajantie
We investigate the end of the inflationary period in the recently proposed scenario of locked inflation, and consider various constraints arising from density perturbations, loop c…
Defect formation in the early universe
A. Rajantie
Topological defects are common in many everyday systems. In general, they appear if a symmetry is broken at a rapid phase transition. In this article, I explain why it is believed…