Numerical evaluation of the bispectrum in multiple field inflation-the transport approach with code

59 pages, 16 figures59 pages, 16 figures. v2: Typos corrected in Eqs. (6.7c,d) but otherwise no changes. This is an author-created, un-copyedited version of an article published in JCAP. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/1475-7516/2016/12/033PyTransport.—Development of PyTransport has been supported by the Royal Society through the support given to DJM by a Royal Society University Research Fellowship and by Science and Technology Facilities Council grant ST/J001546/1. CppTransport.—Development of CppTransport has been supported significantly by an ERC grant: • Precision tests of the inflationary scenario, funded by the European Research Council under the European Union’s Seventh Framework Programme (FP/2007–2013) and ERC Grant Agreement No. 308082. (MD, DS) – 52 – In addition, some development of CppTransport has been supported by other funding sources. Portions of the work described in this document have been supported by: • The UK Science and Technology Facilities Council via grants ST/I000976/1 and ST/L000652/1, which funded the science programme at the University of Sussex Astronomy Centre from April 2011–March 2014 and April 2014–March 2017, respectively. (MD, JF, DS) • The Leverhulme Trust via a Philip Leverhulme Prize. (DS) • The National Science Foundation Grant No. PHYS-1066293 and the hospitality of the Aspen Center for Physics. (MD, JF, DS) • The hospitality of the Higgs Centre for Theoretical Physics at the University of Edinburgh, and the Centre for Astronomy & Particle Physics at the University of Nottingham. (DS) In addition, MD acknowledges funding from the German Science Foundation (DFG) within the Collaborative Research Centre 676 Particles, Strings and the Early Universe and by the ERC Consolidator Grant STRINGFLATION under the HORIZON 2020 contract no. 647995, and JF acknowledges funding from the ERC Consolidator Grant STRINGFLATION under the HORIZON 2020 contract no. 647995 and a grant from the Simons Foundation