Modified teleparallel gravity: Inflation without an inflaton

Rafael Ferraro and Franco Fiorini
Phys. Rev. D 75, 084031 – Published 18 April 2007

Abstract

The Born-Infeld strategy to smooth theories having divergent solutions is applied to the teleparallel equivalent of general relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since the teleparallel Lagrangian only contains first derivatives of the vierbein. We show that the Born-Infeld-modified teleparallelism solves the particle horizon problem in a spatially flat Friedmann-Robertson-Walker (FRW) universe by providing an initial exponential expansion without resorting to an inflaton field.

  • Figure
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  • Received 12 October 2006

DOI:https://doi.org/10.1103/PhysRevD.75.084031

©2007 American Physical Society

Authors & Affiliations

Rafael Ferraro1,2,* and Franco Fiorini1,†

  • 1Instituto de Astronomía y Física del Espacio, Casilla de Correo 67, Sucursal 28, 1428 Buenos Aires, Argentina
  • 2Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina

  • *Electronic address: ferraro@iafe.uba.ar Member of Carrera del Investigador Científico (CONICET, Argentina).
  • Electronic address: franco@iafe.uba.ar

See Also

Born-Infeld gravity in Weitzenböck spacetime

Rafael Ferraro and Franco Fiorini
Phys. Rev. D 78, 124019 (2008)

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Vol. 75, Iss. 8 — 15 April 2007

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