Constraining f(R) gravity as a scalar-tensor theory

Thomas Faulkner, Max Tegmark, Emory F. Bunn, and Yi Mao
Phys. Rev. D 76, 063505 – Published 13 September 2007

Abstract

We search for viable f(R) theories of gravity, making use of the equivalence between such theories and scalar-tensor gravity. We find that models can be made consistent with solar system constraints either by giving the scalar a high mass or by exploiting the so-called chameleon effect. However, in both cases, it appears likely that any late-time cosmic acceleration will be observationally indistinguishable from acceleration caused by a cosmological constant. We also explore further observational constraints from, e.g., big bang nucleosynthesis and inflation.

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  • Received 21 December 2006

DOI:https://doi.org/10.1103/PhysRevD.76.063505

©2007 American Physical Society

Authors & Affiliations

Thomas Faulkner1, Max Tegmark1,2, Emory F. Bunn3,2, and Yi Mao1

  • 1Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 2MIT Kavli Institute for Astrophysics and Space Research, Cambridge, Massachusetts 02139, USA
  • 3Physics Department, University of Richmond, Richmond, Virginia 23173, USA

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Issue

Vol. 76, Iss. 6 — 15 September 2007

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