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Title: Non-gaussian signatures of general inflationary trajectories

Abstract

We carry out a numerical calculation of the bispectrum in generalised trajectories of canonical, single-field inflation. The trajectories are generated in the Hamilton-Jacobi (HJ) formalism based on Hubble Slow Roll (HSR) parameters. The calculation allows generally shape and scale dependent bispectra, or dimensionless f{sub NL}, in the out-of-slow-roll regime. The distributions of f{sub NL} for various shapes and HSR proposals are shown as an example of how this procedure can be used within the context of Monte Carlo exploration of inflationary trajectories. We also show how allowing out-of-slow-roll behaviour can lead to a bispectrum that is relatively large for equilateral shapes.

Authors:
;  [1]
  1. Theoretical Physics, Blackett Laboratory, Imperial College, London, SW7 2BZ (United Kingdom)
Publication Date:
OSTI Identifier:
22375905
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMOLOGICAL INFLATION; HAMILTON-JACOBI EQUATIONS; MONTE CARLO METHOD; TRAJECTORIES

Citation Formats

Horner, Jonathan S., and Contaldi, Carlo R., E-mail: j.horner11@imperial.ac.uk, E-mail: c.contaldi@imperial.ac.uk. Non-gaussian signatures of general inflationary trajectories. United States: N. p., 2014. Web. doi:10.1088/1475-7516/2014/09/001.
Horner, Jonathan S., & Contaldi, Carlo R., E-mail: j.horner11@imperial.ac.uk, E-mail: c.contaldi@imperial.ac.uk. Non-gaussian signatures of general inflationary trajectories. United States. doi:10.1088/1475-7516/2014/09/001.
Horner, Jonathan S., and Contaldi, Carlo R., E-mail: j.horner11@imperial.ac.uk, E-mail: c.contaldi@imperial.ac.uk. Mon . "Non-gaussian signatures of general inflationary trajectories". United States. doi:10.1088/1475-7516/2014/09/001.
@article{osti_22375905,
title = {Non-gaussian signatures of general inflationary trajectories},
author = {Horner, Jonathan S. and Contaldi, Carlo R., E-mail: j.horner11@imperial.ac.uk, E-mail: c.contaldi@imperial.ac.uk},
abstractNote = {We carry out a numerical calculation of the bispectrum in generalised trajectories of canonical, single-field inflation. The trajectories are generated in the Hamilton-Jacobi (HJ) formalism based on Hubble Slow Roll (HSR) parameters. The calculation allows generally shape and scale dependent bispectra, or dimensionless f{sub NL}, in the out-of-slow-roll regime. The distributions of f{sub NL} for various shapes and HSR proposals are shown as an example of how this procedure can be used within the context of Monte Carlo exploration of inflationary trajectories. We also show how allowing out-of-slow-roll behaviour can lead to a bispectrum that is relatively large for equilateral shapes.},
doi = {10.1088/1475-7516/2014/09/001},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 09,
volume = 2014,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 2014},
month = {Mon Sep 01 00:00:00 EDT 2014}
}