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Special Issue "Feature Papers: Entropy Concepts and Applications"

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A special issue of Entropy (ISSN 1099-4300).

Deadline for manuscript submissions: closed (31 December 2009)

Special Issue Editor

Editor-in-Chief
Dr. Peter Harremoës

Copenhagen Business College, Rønne Alle 1, st., DK-2860 Søborg, Denmark
Website | E-Mail
Interests: symmetry; information divergence; cause and effect; Maxwell\'s demon; probability and statistics

Keywords

  • invited papers
  • feature papers related to entropy research

Published Papers (1 paper)

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Research

Open AccessArticle Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem
Entropy 2010, 12(4), 932-952; doi:10.3390/e12040932
Received: 22 March 2010 / Revised: 7 April 2010 / Accepted: 10 April 2010 / Published: 14 April 2010
Cited by 14 | PDF Full-text (286 KB) | HTML Full-text | XML Full-text
Abstract
It is demonstrated that entropy and its density play a significant role in solving the problem of the vacuum energy density (cosmological constant) of the Universe and hence the dark energy problem. Taking this in mind, two most popular models for dark energy—Holographic
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It is demonstrated that entropy and its density play a significant role in solving the problem of the vacuum energy density (cosmological constant) of the Universe and hence the dark energy problem. Taking this in mind, two most popular models for dark energy—Holographic Dark Energy Model and Agegraphic Dark Energy Model—are analysed. It is shown that the fundamental quantities in the first of these models may be expressed in terms of a new small dimensionless parameter that is naturally occurring in High Energy Gravitational Thermodynamics and Gravitational Holography (UV-limit). On this basis, the possibility of a new approach to the problem of Quantum Gravity is discussed. Besides, the results obtained on the uncertainty relation of the pair “cosmological constant–volume of space-time”, where the cosmological constant is a dynamic quantity, are reconsidered and generalized up to the Generalized Uncertainty Relation. Full article
(This article belongs to the Special Issue Feature Papers: Entropy Concepts and Applications)

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