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Abstract: It is usually thought that the quintessence as a fundamental scalar field wasalready present during the inflationary epoch. While there are various modelsin which the quintessence couples to other species, it is attractive toanticipate a coupling between the quintessence and the inflaton in the veryearly universe as well. We consider such a coupling in the context ofk-inflation. The coupling function and the potential of the quintessence arechosen to be of power law forms. We show such a coupling affects the speed ofsound for the inflaton field as well as the power spectra of perturbations.



Autor: Yubei Yue, Bin Chen

Fuente: https://arxiv.org/







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