Cosmology and perturbations in massive gravity

Guido D’Amico
Phys. Rev. D 86, 124019 – Published 6 December 2012

Abstract

We study perturbations around some cosmological backgrounds in the de Rham-Gabadadze-Tolley theory of massive gravity. We develop a general formalism to calculate the perturbations around any background. We derive the Lagrangian for fluctuations in the small-scale limit, and for the open Friedman-Robertson-Walker solution we repeat the analysis around the full background. We find that the perturbations display similar properties: the longitudinal modes of the massive graviton are instantaneous at quadratic level, but they acquire a kinetic term at cubic order.

  • Received 17 October 2012

DOI:https://doi.org/10.1103/PhysRevD.86.124019

© 2012 American Physical Society

Authors & Affiliations

Guido D’Amico*

  • Physics Department, Center for Cosmology and Particle Physics, New York University, 4 Washington Place, New York, New York 10003, USA

  • *gda2@nyu.edu

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Issue

Vol. 86, Iss. 12 — 15 December 2012

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