Nonsingular dilaton cosmology

1998/06/30 by Robert Brandenberger, R. Brandenberger, Richard Easther +2 · 6 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Relativity and Gravitational Theory #astro-ph #gr-qc #hep-th

paper · pdf · doi:10.1088/1126-6708/1998/08/007

published as JHEP 9808 (1998) 007 · 7 pages, uses RevTeX and psfrag, 2 figures (minor typos fixed)

arxiv created 1998/07/15 · openalex publication_date 1998/08/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study spatially homogeneous and isotropic solutions to the equations of motion derived from dilaton gravity, in the presence of a special combination of higher derivative terms in the gravitational action. All solutions are nonsingular. For initial conditions resembling those in the pre-big-bang scenario, there are solutions corresponding to a spatially flat, bouncing Universe originating in a dilaton-dominated contracting phase and emerging as an expanding Friedmann Universe.

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