Local non-Gaussianity from inflation

Research output: Contribution to journalArticlepeer-review

53 Downloads (Pure)

Abstract

The non-Gaussian distribution of primordial perturbations has the potential to reveal the physical processes at work in the very early Universe. Local models provide a well-defined class of non-Gaussian distributions that arise naturally from the non-linear evolution of density perturbations on super-Hubble scales starting from Gaussian field fluctuations during inflation. I describe the delta-N formalism used to calculate the primordial density perturbation on large scales and then review several models for the origin of local primordial non-Gaussianity, including the cuvaton, modulated reheating and ekpyrotic scenarios. I include an appendix with a table of sign conventions used in specific papers.
Original languageEnglish
Pages (from-to)124002
Number of pages1
JournalClassical and Quantum Gravity
Volume27
Issue number12
DOIs
Publication statusPublished - 6 Apr 2010

Fingerprint

Dive into the research topics of 'Local non-Gaussianity from inflation'. Together they form a unique fingerprint.

Cite this