Computing observables in curved multifield models of inflation - A guide (with code) to the transport method
Cosmology and Nongalactic Astrophysics
2016-01-20 v3 High Energy Physics - Theory
Abstract
We describe how to apply the transport method to compute inflationary observables in a broad range of multiple-field models. The method is efficient and encompasses scenarios with curved field-space metrics, violations of slow-roll conditions and turns of the trajectory in field space. It can be used for an arbitrary mass spectrum, including massive modes and models with quasi-single-field dynamics. In this note we focus on practical issues. It is accompanied by a Mathematica code which can be used to explore suitable models, or as a basis for further development.
Cite
@article{arxiv.1502.03125,
title = {Computing observables in curved multifield models of inflation - A guide (with code) to the transport method},
author = {Mafalda Dias and Jonathan Frazer and David Seery},
journal= {arXiv preprint arXiv:1502.03125},
year = {2016}
}
Comments
22 pages; accompanying code available from transportmethod.com. v3: improved treatment of tensor power spectrum and tensor spectral index