Covariant entropy conjecture and concordance cosmological models
| dc.creator | He, Song | |
| dc.creator | Zhang, Hongbao | |
| dc.date | 2007-12-24 | |
| dc.date | 2008-10-13 | |
| dc.date.accessioned | 2026-07-07T11:54:49Z | |
| dc.date.available | 2026-07-07T11:54:49Z | |
| dc.description | 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 $10^{-60}$ on the cosmological constant for our own universe, which thus provides an alternative macroscopic perspective for understanding the long-standing cosmological constant problem. | |
| dc.description | 10 pages, 1 figure, JHEP style, references added, published version | |
| dc.identifier | https://arxiv.org/abs/0712.3821 | |
| dc.identifier | http://arxiv.org/abs/0712.3821 | |
| dc.identifier | JCAP0810:020,2008 | |
| dc.identifier | doi:10.1088/1475-7516/2008/10/020 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205040 | |
| dc.subject | High Energy Physics - Theory | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Covariant entropy conjecture and concordance cosmological models | |
| dc.type | text |