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Entropy, von Neumann and the von Neumann Entropy

Dedicated to the memory of Alfred Wehrl

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Part of the book series: Vienna Circle Institute Yearbook [2000] ((VCIY,volume 8))

Abstract

The highway of the development of entropy is marked by many great names, for example, Clausius, Gibbs, Boltzmann, Szilard, von Neumann, Shannon, Jaynes, and several others. In this article the emphasis is put on von Neumann and on quantum mechanics. The selection of the subjects reflects the taste (and the knowledge) of the author and it must be rather restrictive. In the past 50 years entropy has broken out of thermodynamics and statistical mechanics and invaded communication theory, ergodic theory and shown up in mathematical statistics, social and life sciences. It is practically impossible to present all of its features. The favourite subjects of entropy is about macroscopic phenomena, irreversibility and incomplete knowledge. In the strictly mathematical sense entropy is related to the asymptotics of probabilities or it is a kind of asymptotic behaviour of probabilities.

Work supported by the Hungarian National Foundation for Scientific Research grant no. OTKA T 032662.

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Petz, D. (2001). Entropy, von Neumann and the von Neumann Entropy. In: Rédei, M., Stöltzner, M. (eds) John von Neumann and the Foundations of Quantum Physics. Vienna Circle Institute Yearbook [2000], vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2012-0_7

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  • DOI: https://doi.org/10.1007/978-94-017-2012-0_7

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-5651-1

  • Online ISBN: 978-94-017-2012-0

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