Second Order Perturbations During Inflation Beyond Slow-roll

Details Second Order Perturbations During Inflation Beyond Slow-roll Second Order Perturbations During Inflation Beyond Slow-roll

2011-03-04

arxiv.org/abs/1103.0912v2

JCAP10(2011)029

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

v2: version published in JCAP, references added; v1: 21 pages, 11 figures, numerical package available at http://pyflation.ian

Scientific paper

10.1088/1475-7516/2011/10/029

We numerically calculate the evolution of second order cosmological perturbations for an inflationary scalar field without resorting to the slow-roll approximation or assuming large scales. In contrast to previous approaches we therefore use the full non-slow-roll source term for the second order Klein-Gordon equation which is valid on all scales. The numerical results are consistent with the ones obtained previously where slow-roll is a good approximation. We investigate the effect of localised features in the scalar field potential which break slow-roll for some portion of the evolution. The numerical package solving the second order Klein-Gordon equation has been released under an open source license and is available for download.

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