Primordial gravitational waves spectrum in the interacting Bose-Einstein gas model. (arXiv:2008.12701v1 [gr-qc])

Primordial gravitational waves spectrum in the interacting Bose-Einstein gas model. (arXiv:2008.12701v1 [gr-qc])
<a href="http://arxiv.org/find/gr-qc/1/au:+Izquierdo_G/0/1/0/all/0/1">German Izquierdo</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Alonzo_G/0/1/0/all/0/1">Gildardo Alonzo</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Besprosvany_J/0/1/0/all/0/1">Jaime Besprosvany</a>

We study the evolution and power spectrum of primordial gravitational waves
in the interactive Bose-Einstein gas model for dark energy, relevant, as it
addresses the coincidence problem. The model is applied in the radiation,
matter and dark-energy domination stages.

The model introduces a scale factor associated with the radiation-matter
transition which influences the gravitational spectrum. We focus on the impact
of the free parameters on both the gravitational waves amplitude and its
power-spectrum slope. For sets of parameters fitting Hubble’s law, we show that
the model’s parameter for today’s dark-matter energy density has a noticeable
impact on such waves, while the others produce an indistinguishable effect. The
feasibility of detecting such waves under present and future measurements is
discussed.

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