Naturalness of the Vacuum Energy in Holographic Theories

Details Naturalness of the Vacuum Energy in Holographic Theories Naturalness of the Vacuum Energy in Holographic Theories

2006-03-17

arxiv.org/abs/hep-th/0603133v1

Physics

High Energy Physics

High Energy Physics - Theory

4 pages no figures

Scientific paper

Based on the cosmic holographic conjecture of Fischler and Susskind, we point out that the average energy density of the universe is bound from above by its entropy limit. Since Friedmann's equation saturates this relation, the measured value of the cosmological energy density is completely natural in the framework of holographic thermodynamics: vacuum energy density fills the available quantum degrees of freedom allowed by the holographic bound. This is in strong contrast with traditional quantum field theories where, since no similar bound applies, the natural value of the vacuum energy is expected to be 123 orders of magnitude higher than the holographic value. Based on our simple calculation, holographic thermodynamics, and consequently any future holographic quantum (gravity) theory, resolves the vacuum energy puzzle.

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