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

Xin Zhang
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Abstract

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.

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Xin Zhang. 2005-09-27. Coupled Quintessence in a Power-Law Case and the Cosmic Coincidence Problem. https://doi.org/10.1142/s0217732305017597

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