From the book Quantum Measurement by Vladimir B. Braginsky and Farid Ya.Khalili
How do they go from 5.18 to 5.19?
2026-04-01 15:07:40.1775056060
Quantum measurement - How does this commutator correspond to the following?
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See Qmechanic's discussion (especially point III) from a related thread on physics.SE.
The SE robot thinks my answer is trivial and relegated it to a comment, so I'm adding more words to foil its interference. You should be able to find what you need in Qmechanic's post.