Parametric Resonance and Cosmological Gravitational Waves

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dc.creatorSá, Paulo M.
dc.creatorHenriques, Alfredo B.
dc.date2007-12-17
dc.date.accessioned2026-07-07T12:13:59Z
dc.date.available2026-07-07T12:13:59Z
dc.descriptionWe investigate the production of gravitational waves due to quantum fluctuations of the vacuum during the transition from the inflationary to the radiation-dominated eras of the universe, assuming this transition to be dominated by the phenomenon of parametric resonance. The energy spectrum of the gravitational waves is calculated using the method of continuous Bogoliubov coefficients, which avoids the problem of overproduction of gravitons at large frequencies. We found, on the sole basis of the mechanism of quantum fluctuations, that the resonance field leaves no explicit and distinctive imprint on the gravitational-wave energy spectrum, apart an overall upward or downward translation. Therefore, the main features in the spectrum are due to the inflaton field, which leaves a characteristic imprint at frequencies of the order of MHz/GHz.
dc.description8 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0712.2697
dc.identifierhttp://arxiv.org/abs/0712.2697
dc.identifierPhys.Rev.D77:064002,2008
dc.identifierdoi:10.1103/PhysRevD.77.064002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211040
dc.subjectAstrophysics
dc.titleParametric Resonance and Cosmological Gravitational Waves
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