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- Title
TESTING THE INFLATIONARY NULL ENERGY CONDITION WITH CURRENT AND FUTURE COSMIC MICROWAVE BACKGROUND DATA.
- Authors
VALENTINO, ELEONORA DI; MELCHIORRI, ALESSANDRO; PAGANO, LUCA
- Abstract
In some classes of inflationary models, a violation of the null energy condition (NEC) is expected during the phase of accelerated expansion. The most striking observational effect would be a "blue" spectrum of primordial gravitational waves with a spectral index nT larger than zero. In this brief paper, we first update the current constraints on the amplitude of a blue GW spectrum. We then forecast the ability of the ongoing Planck satellite mission to detect a violation of the NEC during inflation, showing that the detection of the GW background is substantially improved if the NEC is violated during inflation.
- Subjects
METAPHYSICAL cosmology; COSMIC background radiation; GRAVITATIONAL waves; PLANCK (Artificial satellite); INFLATIONARY universe; ASTRONOMICAL observations; DATA analysis
- Publication
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology, 2011, Vol 20, Issue 7, p1183
- ISSN
0218-2718
- Publication type
Article
- DOI
10.1142/S0218271811019311