Dilaton Contributions to the Cosmic Gravitational Wave Background

Details Dilaton Contributions to the Cosmic Gravitational Wave Background Dilaton Contributions to the Cosmic Gravitational Wave Background

1992-11-17

arxiv.org/abs/gr-qc/9211021v1

Phys.Rev. D47 (1993) 1519-1528

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

26 pages, plain tex (to appear in Phys.Rev.D, 1 fig available from the authors upon req.)

Scientific paper

10.1103/PhysRevD.47.1519

We consider the cosmological amplification of a metric perturbation propagating in a higher-dimensional Brans-Dicke background, including a non trivial dilaton evolution. We discuss the properties of the spectral energy density of the produced gravitons (as well as of the associated squeezing parameter), and we show that the present observational bounds on the graviton spectrum provide significant information on the dynamical evolution of the early universe.

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