Stochastic gravitational waves from a new type of modified Chaplygin gas

Abstract

We propose a new scenario for the early universe where there is a smooth transition between an early de Sitter-like phase and a radiation dominated era. In this model, the matter content is modelled by a new type of generalised Chaplygin gas for the early universe, with an underlying scalar field description. We study the gravitational waves generated by the quantum fluctuations. In particular, we calculate the gravitational wave power spectrum, as it would be measured today, following the method of the Bogoliubov coefficients. We show that the high frequencies region of the spectrum depends strongly on one of the parameters of the model. On the other hand, we use the number of e-folds, along with the power spectra and spectral index of the scalar perturbations, to constrain the model observationally.

8 pages, 6 figures, RevTeX 4. Published in PRD

References in corpus (10)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Quantum cosmology with big-brake singularity
• On the quantum fate of singularities in a dark-energy dominated universe
• On the generalised Chaplygin gas: worse than a big rip or quieter than a sudden singularity?
• WMAP5 constraints on the unified model of dark energy and dark matter
• Chaplygin inspired Inflation
• Tachyon cosmology, supernovae data and the Big Brake singularity
• Unification of inflation, dark energy, and dark matter within the Salam-Sezgin cosmological model
• Parametric Resonance and Cosmological Gravitational Waves
• Gravitational wave generation in power-law inflationary models

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