Journal Article

The Von Neumann Entropy: A Reply to Shenker

Leah Henderson

in The British Journal for the Philosophy of Science

Published on behalf of British Society for the Philosophy of Science

Volume 54, issue 2, pages 291-296
Published in print June 2003 | ISSN: 0007-0882
Published online June 2003 | e-ISSN: 1464-3537 | DOI: http://dx.doi.org/10.1093/bjps/54.2.291
The Von Neumann Entropy: A Reply to Shenker

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Shenker has claimed that Von Neumann's argument for identifying the quantum mechanical entropy with the Von Neumann entropy, S(ρ) = − ktr(ρ log ρ), is invalid. Her claim rests on a misunderstanding of the idea of a quantum mechanical pure state. I demonstrate this, and provide a further explanation of Von Neumann's argument.

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Subjects: Philosophy of Science ; Science and Mathematics

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