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

Journal Article · Tue Dec 01 00:00:00 EST 2015 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2015/12/030· OSTI ID:22525130

Dias, Mafalda; Seery, David ^[1]; Frazer, Jonathan ^[2]

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1. Astronomy Centre, University of Sussex, Brighton BN1 9QH (United Kingdom)
2. Department of Theoretical Physics, University of the Basque Country, UPV/EHU, 48040 Bilbao (Spain)

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.

• OSTI ID: 22525130
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 12; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COMPUTER CALCULATIONS
COSMOLOGICAL INFLATION
DIAGRAMS
INFLATIONARY UNIVERSE
M CODES
MASS SPECTRA
METRICS
SPACE