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Entropy
Special Issues
Feature Papers: Entropy Concepts and Applications
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Feature Papers: Entropy Concepts and Applications

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

Deadline for manuscript submissions: closed (31 December 2009)

Special Issue Editor

Dr. Peter Harremoës

E-Mail Website
Guest Editor
Copenhagen Business College, Rønne Alle 1, st., 2860 Søborg, Denmark
Interests: cause and effect; entropy; exponential families; graphical models; information divergence; minimum description length; quantum information; statistical mechanics
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Keywords

  • invited papers
  • feature papers related to entropy research

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Published Papers (1 paper)

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Research

21 pages, 286 KiB  
Article
Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem
by Alexander Shalyt-Margolin
Entropy 2010, 12(4), 932-952; https://doi.org/10.3390/e12040932 - 14 Apr 2010
Cited by 15 | Viewed by 8362
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 [...] Read more.
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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