Covariant entropy conjecture and concordance cosmological models
arXiv:0712.3821 · doi:10.1088/1475-7516/2008/10/020
Abstract
Recently a covariant entropy conjecture has been proposed for dynamical horizons. We apply this conjecture to concordance cosmological models, namely, those cosmological models filled with perfect fluids, in the presence of a positive cosmological constant. As a result, we find this conjecture has a severe constraint power. Not only does this conjecture rule out those cosmological models disfavored by the anthropic principle, but also it imposes an upper bound on the cosmological constant for our own universe, which thus provides an alternative macroscopic perspective for understanding the long-standing cosmological constant problem.
10 pages, 1 figure, JHEP style, references added, published version
References in corpus (17)
- The World as a Hologram
- Microscopic Origin of the Bekenstein-Hawking Entropy
- The holographic principle
- Quantum Geometry and Black Hole Entropy
- A Covariant Entropy Conjecture
- Isolated and dynamical horizons and their applications
- Holography in General Space-times
- Dynamical Horizons and their Properties
- Dynamical Horizons: Energy, Angular Momentum, Fluxes and Balance Laws
- Proof of Classical Versions of the Bousso Entropy Bound and of the Generalized Second Law
- The Holographic Principle for General Backgrounds
- The Penrose inequality and apparent horizons
- Black Hole Entropy as Causal Links
- Evidence for an entropy bound from fundamentally discrete gravity
- A covariant entropy conjecture on cosmological dynamical horizon
- Proof of the entropy bound on dynamical horizons
- The black hole dynamical horizon and generalized second law of thermodynamics