Higher-order gravity and the cosmological background of gravitational waves

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The cosmological background of gravitational waves can be tuned by the higher-order corrections to the gravitational Lagrangian. In particular, it can be shown that assuming $R^{1+ε}$, where $ε$ indicates a generic (eventually small) correction to the Hilbert-Einstein action in the Ricci scalar $R$, gives a parametric approach to control the evolution and the production mechanism of gravitational waves in the early Universe.
6 pages, 8 figures

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General Relativity and Quantum Cosmology

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http://salesiana.dossiersoluciones.com/handle/123456789/199940

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0712.2980
 http://arxiv.org/abs/0712.2980
 Astropart.Phys.29:125-129,2008
 doi:10.1016/j.astropartphys.2007.12.001

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arXiv