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Quintessence dissipative superattractor cosmology

Luis P. Chimento·Alejandro S. Jakubi·Norberto A. Zuccala
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Abstract

We investigate the simplest quintessence dissipative dark matter attractor cosmology characterized by a constant quintessence baryotropic index and a power--law expansion. We show a class of accelerated coincidence--solving attractor solutions converging to this asymptotic behavior. Despite its simplicity, such a ``superattractor'' regime provides a model of the recent universe that also exhibits an excellent fit to supernovae luminosity observations and no age conflict. Our best fit gives $α=1.71\pm 0.29$ for the power-law exponent. We calculate for this regime the evolution of density and entropy perturbations.

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Luis P. Chimento, Alejandro S. Jakubi, Norberto A. Zuccala. 2001-04-17. Quintessence dissipative superattractor cosmology. https://doi.org/10.1103/physrevd.63.103508

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