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

Cited by in corpus (1)

• Thermodynamical Interpretation of the Interacting Holographic Dark Energy Model in a non-flat Universe