2006/10/31 by Rafael Ferraro, Franco Fiorini · 6 citations
Physics and Astronomy · #gr-qc #astro-ph #hep-th
paper · pdf · doi:10.1103/physrevd.75.084031
published as Phys.Rev.D75:084031,2007 · 4 pages, 2 figures. Version to be published in Physical Review D
arxiv created 2007/03/29 · arxiv updated 2009/12/01
Born-Infeld strategy to smooth theories having divergent solutions is applied to teleparallel equivalent of General Relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since teleparallel Lagrangian only contains first derivatives of the vierbein. We show that Born-Infeld-modified teleparallelism solves the particle horizon problem in a spatially flat FRW universe by providing an initial exponential expansion without resorting to an inflaton field.