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Volume 4, February

Entropy, Volume 4, Issue 1 (January 2002) – 3 articles , Pages 1-34

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Communication
Comments on "A Law of Information Growth"
Entropy 2002, 4(1), 32-34; https://doi.org/10.3390/e4010032 - 30 Jan 2002
Cited by 3 | Viewed by 3775
Abstract
Notes added in proof of an earlier paper on an empirical "law" of information growth in evolution, and in response to questions raised therein. Full article
Article
Algorithmic Complexity in Cosmology and Quantum Gravity
Entropy 2002, 4(1), 3-31; https://doi.org/10.3390/e4010003 - 30 Jan 2002
Cited by 2 | Viewed by 4753
Abstract
In this article we use the idea of algorithmic complexity (AC) to study various cosmological scenarios, and as a means of quantizing the ravitational interaction. We look at 5D and 7D cosmological models where the Universe begins as a higher dimensional Planck size [...] Read more.
In this article we use the idea of algorithmic complexity (AC) to study various cosmological scenarios, and as a means of quantizing the ravitational interaction. We look at 5D and 7D cosmological models where the Universe begins as a higher dimensional Planck size spacetime which fluctuates between Euclidean and Lorentzian signatures. These fluctuations are overned by the AC of the two different signatures. At some point a transition to a 4D Lorentzian signature Universe occurs, with the extra dimensions becoming "frozen" or non-dynamical. We also apply the idea of algorithmic complexity to study composite wormholes, the entropy of black holes, and the path integral for quantum gravity. Some of the physical consequences of the idea presented here are:the birth of the Universe with a fluctuating metric signature; the transition from a fluctuating metric signature to Lorentzian one; "frozen" extra dimensions as a consequence of this transition; quantum handles in the spacetime foam as regions with multidimensional gravity. Full article
Editorial
Entropy Enters Its Fourth Year
Entropy 2002, 4(1), 1-2; https://doi.org/10.3390/e4010001 - 30 Jan 2002
Viewed by 2533
Abstract
In a vivid statement that has become part of physics’ folklore, Eddington expressed an almost mystical view of the second law [1]:[...] Full article
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