Mild Quasilocal Non-Gaussianity as a Signature of Modified Gravity During Inflation

Nicola Bartolo, Dario Cannone, Raul Jimenez, Sabino Matarrese, and Licia Verde
Phys. Rev. Lett. 113, 161303 – Published 17 October 2014

Abstract

We show that modifications of Einstein gravity during inflation could leave potentially measurable imprints on cosmological observables in the form of non-Gaussian perturbations. This is due to the fact that these modifications appear in the form of an extra field that could have nontrivial interactions with the inflaton. We show it explicitly for the case R+αR2, where nearly scale-invariant non-Gaussianity at the level of fNL(1to30) can be obtained, in a quasilocal configuration.

  • Figure
  • Figure
  • Received 24 July 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.161303

© 2014 American Physical Society

Authors & Affiliations

Nicola Bartolo1,2,*, Dario Cannone1,2,†, Raul Jimenez3,4,‡, Sabino Matarrese1,2,5,§, and Licia Verde3,6,¶

  • 1Dipartimento di Fisica e Astronomia G. Galilei, Università degli Studi di Padova, I-35131 Padova, Italy
  • 2INFN, Sezione di Padova, I-35131 Padova, Italy
  • 3ICREA & ICC, University of Barcelona, Marti i Franques 1, Barcelona 08028, Spain
  • 4Institute for Applied Computational Science, Harvard University, Massachusetts 02138, USA
  • 5Gran Sasso Science Institute (INFN), viale F. Crispi 7, 67100 L’Aquila, Italy
  • 6Institute of Theoretical Astrophysics, University of Oslo, 0315 Oslo, Norway

  • *nicola.bartolo@pd.infn.it
  • dario.cannone@pd.infn.it
  • raul.jimenez@icc.ub.edu
  • §sabino.matarrese@pd.infn.it
  • liciaverde@icc.ub.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 113, Iss. 16 — 17 October 2014

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×