Von Neumann's Entropy Does Not Correspond to Thermodynamic Entropy

Philosophy of Science 73 (2):153-174 (2006)
Von Neumann argued by means of a thought experiment involving measurements of spin observables that the quantum mechanical quantity is conceptually equivalent to thermodynamic entropy. We analyze Von Neumann's thought experiment and show that his argument fails. Over the past few years there has been a dispute in the literature regarding the Von Neumann entropy. It turns out that each contribution to this dispute addressed a different special case. In this paper we generalize the discussion and examine the full matrix of possibilities that are relevant for the evaluation and understanding of Von Neumann’s argument
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DOI 10.1086/510816
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Simon Friederich (2011). How to Spell Out the Epistemic Conception of Quantum States. Studies in History and Philosophy of Science Part B 42 (3):149-157.
Giovanni Valente (2008). John Von Neumann's Mathematical “Utopia” in Quantum Theory. Studies in History and Philosophy of Science Part B 39 (4):860-871.

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