A model for a non-minimally coupled scalar field interacting with dark matter

Abstract

In this work we investigate the evolution of a Universe consisted of a scalar field, a dark matter field and noninteracting baryonic matter and radiation. The scalar field, which plays the role of dark energy, is non-minimally coupled to space-time curvature, and drives the Universe to a present accelerated expansion. The non-relativistic dark matter field interacts directly with the dark energy and has a pressure which follows from a thermodynamic theory. We show that this model can reproduce the expected behavior of the density parameters, deceleration parameter and luminosity distance.

Bulk Viscous Cosmological Model with Interacting Dark Fluids

“…This may also alleviate the coincidence problem, since an appropriate choice of the interaction term makes the ratio between the energy densities of the matter field and dark energy nearly constant at low red shifts. Several cosmological models have been proposed with interacting dark components; see [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] for examples. On the other hand, irreversible processes in the evolution of the Universe may also contribute significantly to alleviate the coincidence problem.…”

Cosmological models with interacting components and mass-varying neutrinos

“…The latter has the great advantage of experimental study, even though the neutrino interaction is quite weak, the abundance of this particle not only allows for detection, but opens a way to studies of its oscillating mass evolution, permitting one to develop more precise theoretical models, determining limits of its mass. In this paper, we work with the spatially flat Friedmann-Robertson-Walker metric and analyze the energy density evolution under two different kinds of dark energy-dark matter coupling, the Wetterich interaction [13,22] and the Anderson and Carroll interaction model [14,23] which we find to be equivalent. Neutrinos are assumed to show a mass-varying behavior and to be coupled to dark energy by a model proposed by Brookfield et al [15].…”

Dark energy interacting with neutrinos and dark matter: a phenomenological theory

“…Furthermore, the measurements of the rotation curves of spiral galaxies [15] as well as other astronomical experiments suggest that the luminous matter represents only a small amount of the massive particles of the Universe, and that the more significant amount is related to dark matter. That offered a new setting for cosmological models with dark energy and dark matter and in these contexts many interesting phenomenological models appear in the literature analyzing the interaction of neutrinos [16,17,18] and dark matter [19,20,21,22,23,24] with dark energy. With respect to dark energy some exotic equations of state were proposed in the literature and among others we quote the van der Waals [25,26,27,28,29] and the Chaplygin [30,31,32,33] equations of state.…”