Wolfram Library Archive

Courseware Demos MathSource Technical Notes
All Collections Articles Books Conference Proceedings

Computing observables in curved multifield models of inflation | A guide (with code) to the transport method

Mafalda Dias
Jonathan Frazer
David Seery
Journal / Anthology

Journal of Cosmology and Astroparticle Physics
Year: 2015
Volume: 12

We describe how to apply the transport method to compute in 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.

*Science > Physics