Coupled Quintessence in a Power-Law Case and the Cosmic Coincidence Problem

By Xin Zhang. 2005

141 citations recorded by the source corpus.

The problem of the cosmic coincidence is a longstanding puzzle. This conundrum may be solved by introducing a coupling between the two dark sectors. In this letter, we study a coupled quintessence scenario in which the scalar field evolves in a power law potential and the mass of dark matter particles depends on a power law function of ϕ. It is shown that this scenario has a stable attractor solution and can thus provide a natural solution to the cosmic coincidence problem.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/7120c3a9e06e711ebe2b45204bce6bddcc6d2b3b

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Citations in the corpus

Nonminimal dark sector physics and cosmological tensions (2019, background): “[200] X.”
Constraints on holographic dark energy from the latest supernovae, galaxy clustering, and cosmic microwave background anisotropy observations (2007, background): “Numerous other candidates for dark energy have also been proposed in the literature, such as an evolving canonical scalar field [14, 15, 16, 17, 18, 19] usually referred to as quintessence, the phantom energy [20, 21, 22] with an equation-of-state smaller than −1 violating the weak energy condition,”
Observational constraints on teleparallel dark energy (2011, methodology): “Since the model includes the scalar-field potential, we perform our analysis for three different potential cases, given by: • Power-Law potential This potential class is common in cosmology [77–81].”