Dynamics of dark energy with a coupling to dark matter

2008/01/23 by Christian G. Boehmer, Christian G. Böhmer, Gabriela Caldera-Cabral +2 · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #astro-ph #gr-qc

paper · pdf · doi:10.1103/physrevd.78.023505

published as Phys.Rev.D78:023505,2008 · 11 pages, 4 figures, revtex, references added

arxiv created 2008/01/23 · openalex publication_date 2008/07/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

Dark energy and dark matter are the dominant sources in the evolution of the late universe. They are currently only indirectly detected via their gravitational effects, and there could be a coupling between them without violating observational constraints. We investigate the background dynamics when dark energy is modeled as exponential quintessence and is coupled to dark matter via simple models of energy exchange. We introduce a new form of dark sector coupling, which leads to a more complicated dynamical phase space and has a better physical motivation than previous mathematically similar couplings.

Citations

• Superacceleration as the signature of a dark sector interaction
• Thermal leptogenesis in a model with mass varying neutrinos
• Cosmologies with energy exchange
• Cosmological perturbations from varying masses and couplings

Cited by

• Expanding Universe: slowdown or speedup?
• Adiabatic initial conditions for perturbations in interacting dark energy models