Bousso's Covariant Entropy Bound and Padmanabhan's Emergent Paradigm
Year: 2016
Type: preprint
Abstract: We study the Padmanabhan's emergent Universe in the context of Bousso's covariant conjecture. We find that for a flat Universe, this conjecture can be applied for the system of Padmanabhan's emergent Universe. It turns out that the maximum bulk entropy of Padmanabhan's emergent Universe coincides with the upper bound of Bousso's covariant on the null surface defined by Hubble horizon, provided that the Universe is just filled by the cosmological constant or radiation field which represent maximal during inflation and subsequent radiation dominant era. This maximal is lost by the appearance of matter system in the Universe at matter dominant era. Applying D-bound on the matter system in the Padmanabhan's emergent Universe, we find that the apparent cosmological horizon of a flat Universe in matter dominant era has less area and than those (maximal) of apparent cosmological horizon of empty de-Sitter space, in complete agreement with our conclusion. The maximal area and in the Padmanabhan's emergent Universe are recovered soon as possible by transition from matter dominant to cosmological constant eras, provided that the matter inside the Universe is moved completely outward the apparent cosmological horizon in an accelerating way at late times.
Source: arXiv (Cornell University)
Authors: H. Hadi, Y. Heydarzade, F. Darabi
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3093705807