In quantum mechanics, values of physical observables such as energy and momentum are treated as eigenvalues rather than as values of functions on phase space.
Sources
- Mathematical formulation of quantum mechanics (en.wikipedia.org)
- https://chem.libretexts.org/Courses/Grinnell_College/CHM_364:_Physical_Chemistry_2_(Grinnell_College)/04:_Postulates_and_Principles_of_Quantum_Mechanics/4.03:_Observable_Quantities_Must_Be_Eigenvalues_of_Quantum_Mechanical_Operators (chem.libretexts.org)
- https://ncatlab.org/nlab/show/observable (ncatlab.org)
- https://arxiv.org/pdf/1706.03111 (arxiv.org)
- https://arxiv.org/pdf/quant-ph/0308038 (arxiv.org)
- https://arxiv.org/pdf/2210.13973 (arxiv.org)
- https://arxiv.org/pdf/quant-ph/0305063 (arxiv.org)
- https://arxiv.org/pdf/1001.4632 (arxiv.org)
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