Accelerating the Universe with Gravitational Waves

Details Accelerating the Universe with Gravitational Waves Accelerating the Universe with Gravitational Waves

2009-09-10

arxiv.org/abs/0909.1922v2

JCAP 1002:011,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, 4 figures. Replaced with version published by JCAP - some discussion and references added concerning second-order gr

Scientific paper

10.1088/1475-7516/2010/02/011

Inflation generically produces primordial gravitational waves with a red
spectral tilt. In this paper we calculate the backreaction produced by these
gravitational waves on the expansion of the universe. We find that in radiation
domination the backreaction acts as a relativistic fluid, while in matter
domination a small dark energy emerges with an equation of state w=-8/9.

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