Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem
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 Agegra...
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| Format: | Article |
| Language: | English |
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MDPI AG
2010-04-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/12/4/932/ |
| _version_ | 1798002813043736576 |
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| author | Alexander Shalyt-Margolin |
| author_facet | Alexander Shalyt-Margolin |
| author_sort | Alexander Shalyt-Margolin |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-11T11:58:09Z |
| format | Article |
| id | doaj.art-12c6cec6b13c431babf88eb2cd0d216b |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-11T11:58:09Z |
| publishDate | 2010-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-12c6cec6b13c431babf88eb2cd0d216b2022-12-22T04:24:58ZengMDPI AGEntropy1099-43002010-04-0112493295210.3390/e12040932Entropy in the Present and Early Universe: New Small Parameters and Dark Energy ProblemAlexander Shalyt-MargolinIt 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.http://www.mdpi.com/1099-4300/12/4/932/dark energydeformed quantum theorynew small parameters |
| spellingShingle | Alexander Shalyt-Margolin Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem Entropy dark energy deformed quantum theory new small parameters |
| title | Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem |
| title_full | Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem |
| title_fullStr | Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem |
| title_full_unstemmed | Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem |
| title_short | Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem |
| title_sort | entropy in the present and early universe new small parameters and dark energy problem |
| topic | dark energy deformed quantum theory new small parameters |
| url | http://www.mdpi.com/1099-4300/12/4/932/ |
| work_keys_str_mv | AT alexandershalytmargolin entropyinthepresentandearlyuniversenewsmallparametersanddarkenergyproblem |