Sourced Friedmann equations with holographic energy density

Abstract

We reexamine cosmological applications of the holographic energy density in the framework of sourced Friedmann equations. This framework is suitable because it can accommodate a macroscopic interaction between holographic and ordinary matter naturally. In the case that the holographic energy density decays into dust matter, we propose a microscopic mechanism to generate an accelerating phase. Actually, the cosmic anti-friction arisen from the decay process induces acceleration. For examples, we introduce two IR cutoffs of Hubble horizon and future event horizon to test this framework. As a result, it is shown that the equations of state for the holographic energy density are determined to be the same negative constants as those for the dust matter.

11 pages, final version to appear in PLB

References in corpus (6)

• Can vacuum decay in our Universe?
• Transplanckian energy production and slow roll inflation
• A CMB/Dark Energy Cosmic Duality
• Back-Reaction and the Trans-Planckian Problem of Inflation Revisited
• Holographic principle and dark energy
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