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The History of Hilbert-Space Formulations of Classical Physics

Barandes, Jacob A. (2025) The History of Hilbert-Space Formulations of Classical Physics. [Preprint]

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Abstract

Hilbert-space techniques are widely used not only for quantum theory, but also for classical physics. Two important examples are the Koopman-von Neumann (KvN) formulation and the method of “classical” wave functions. As this paper explains, these two approaches are conceptually distinct. In particular, the method of classical wave functions was not due to Bernard Koopman and John von Neumann, but was developed independently by a number of later researchers, perhaps first by Mario Schönberg, with key contributions from Angelo Loinger, Giacomo Della Riccia, Norbert Wiener, and E. C. George Sudarshan. The primary goals of this paper are to explain these two approaches, describe the relevant history in detail, and give credit where credit is due.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Barandes, Jacob A.jacob_barandes@harvard.edu0000-0002-3740-4418
Keywords: history of physics; Hilbert-space methods; Koopman-von Neumann formulation; classical wave functions
Subjects: Specific Sciences > Physics > Classical Physics
General Issues > History of Philosophy of Science
Specific Sciences > Mathematics
Specific Sciences > Physics
Specific Sciences > Physics > Quantum Mechanics
Depositing User: Dr. Jacob Barandes
Date Deposited: 30 Jul 2025 12:51
Last Modified: 30 Jul 2025 12:51
Item ID: 26043
Subjects: Specific Sciences > Physics > Classical Physics
General Issues > History of Philosophy of Science
Specific Sciences > Mathematics
Specific Sciences > Physics
Specific Sciences > Physics > Quantum Mechanics
Date: 28 July 2025
URI: https://philsci-archive.pitt.edu/id/eprint/26043

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