Dark Energy: A Unifying View

Abstract

Different models of the cosmic substratum which pretend to describe the present stage of accelerated expansion of the Universe like the $\Lambda$CDM model or a Chaplygin gas, can be seen as special realizations of a holographic dark energy cosmology if the option of an interaction between pressurless dark matter and dark energy is taken seriously. The corresponding interaction strength parameter plays the role of a cosmological constant. Differences occur at the perturbative level. In particular, the pressure perturbations are intrinsically non-adiabatic.

9 pages, selected for "Honorable Mention" by the Gravity Research Foundation

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Cited by in corpus (18)

• Interacting models may be key to solve the cosmic coincidence problem
• The Cosmological Dynamics of Interacting Holographic Dark Energy Model
• Viscous dark fluid universe
• On holographic dark-energy models
• Thermodynamical Interpretation of the Interacting Holographic Dark Energy Model in a non-flat Universe
• Bulk viscous cosmology with causal transport theory
• Cosmological dynamics with non-linear interactions
• Non-adiabatic dark fluid cosmology
• Transient cosmic acceleration from interacting fluids
• Interacting Cosmological Fluids and the Coincidence Problem
• Multi-horizon spherically symmetric spacetimes with several scales of vacuum energy
• Cosmology with Ricci dark energy
• On sign-changeable interaction in FLRW cosmology
• Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenarios
• Viscous dark fluid Universe: a unified model of the dark sector?
• Interacting Holographic dark energy with matter creation: A dynamical system analysis
• Interacting non-minimally coupled canonical, phantom and quintom models of holographic dark energy in non-flat universe
• Constraints on Holographic cosmologies from strong lensing systems