http://www.mdpi.com/journal/entropy/special_issues/quantum_information_theory/ {snippet name="submission_info"} http://www.mdpi.com/1099-4300/7/4/208/ In previous publications I have suggested that opposite thermodynamic arrows of time could coexist in our universe. This letter responds to the comments of H. D. Zeh (previous letter in this journal). http://www.mdpi.com/1099-4300/7/4/208/ Thu, 06 Oct 2005 00:00:00 CEST Entropy 2005-10-06 7 4 Article 208 220 1099-4300 Two-way thermodynamics: Could it really happen? 2005-10-06 doi: 10.3390/e7040208 L. S. Schulman http://www.mdpi.com/1099-4300/7/4/199/ I argue that opposite arrows of time, while being logically possible, cannot realistically be assumed to exist during one and the same epoch of our universe. http://www.mdpi.com/1099-4300/7/4/199/ Fri, 23 Sep 2005 00:00:00 CEST Entropy 2005-09-23 7 4 Letter 199 207 1099-4300 Remarks on the Compatibility of Opposite Arrows of Time 2005-09-23 doi: 10.3390/e7040199 H. D. Zeh http://www.mdpi.com/1099-4300/5/2/88/ It is argued that a true transdisciplinary information science going from physical information to phenomenological understanding needs a metaphysical framework. Three different kinds of causality are implied: efficient, formal and final. And at least five different levels of existence are needed: 1. The quantum vacuum fields with entangled causation. 2. The physical level with is energy and force-based efficient causation. 3. The informational-chemical level with its formal causation based on pattern fitting. 4. The biological-semiotic level with its non-conscious final causation and 5. The social-linguistic level of self-consciousness with its conscious goal-oriented final causation. To integrate these consistently in an evolutionary theory as emergent levels, neither mechanical determinism nor complexity theory are sufficient because they cannot be a foundation for a theory of lived meaning. C. S. Peirce\'s triadic semiotic philosophy combined with a cybernetic and systemic view, like N. Luhmann\'s, could create the framework I call Cybersemiotics. http://www.mdpi.com/1099-4300/5/2/88/ Mon, 30 Jun 2003 00:00:00 CEST Entropy 2003-06-30 5 2 Article 88 99 1099-4300 Information Seen as Part of the Development of Living Intelligence: the Five-Leveled Cybersemiotic Framework for FIS 2003-06-30 doi: 10.3390/e5020088 Soren Brier http://www.mdpi.com/1099-4300/4/6/168/ In this paper we apply to a class of static and time-independent geometries the recently developed formalism of deformed algebras of quantum fields in curved backgrounds. In particular we derive: i) some non-trivial features of the entanglement of the quantum vacuum, such as the robustness against interaction with the environment; ii) the thermal properties and the entropy of black holes for space-times with a unique event horizon, such as Schwarzschild, de Sitter and Rindler space-times. http://www.mdpi.com/1099-4300/4/6/168/ Mon, 03 Feb 2003 00:00:00 CET Entropy 2003-02-03 4 6 Article 168 182 1099-4300 Entropy of Black Holes: A Quantum Algebraic Approach 2003-02-03 doi: 10.3390/e4060168 A. Iorio G. Lambiase G. Vitiello http://www.mdpi.com/1099-4300/3/1/12/ An elementary derivation of the Black Hole Entropy area relation in any dimension is provided based on the New Extended Scale Relativity Principle and Shannon\'s Information Entropy. The well known entropy-area linear Bekenstein-Hawking relation is derived. We discuss briefly how to derive the most recently obtained Logarithmic and higher order corrections to the linear entropy-area law in full agreement with the standard results in the literature. http://www.mdpi.com/1099-4300/3/1/12/ Mon, 26 Mar 2001 00:00:00 CEST Entropy 2001-03-26 3 1 Article 12 26 1099-4300 An Elementary Derivation of The Black Hole Entropy in Any Dimension 2001-03-26 doi: 10.3390/e3010012 Carlos Castro