Dynamical Horizon Entropy Bound Conjecture in Loop Quantum Cosmology

Details Dynamical Horizon Entropy Bound Conjecture in Loop Quantum Cosmology Dynamical Horizon Entropy Bound Conjecture in Loop Quantum Cosmology

2010-01-02

arxiv.org/abs/1001.0288v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, 2 figures, revised version

Scientific paper

The covariant entropy bound conjecture is an important hint for the quantum gravity, with several versions available in the literature. For cosmology, Ashtekar and Wilson-Ewing ever show the consistence between the loop gravity theory and one version of this conjecture. Recently, S. He and H. Zhang proposed a version for the dynamical horizon of the universe, which validates the entropy bound conjecture for the cosmology filled with perfect fluid in the classical scenario when the universe is far away from the big bang singularity. However, their conjecture breaks down near big bang region. We examine this conjecture in the context of the loop quantum cosmology. With the example of photon gas, this conjecture is protected by the quantum geometry effects as expected.

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