I'm starting a series on "Quantum Mechanics Basics". Feel free to comment with any questions about the posted material. Be sure to stay tuned and enjoy!pic.twitter.com/NHmeD3kR4H
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What is an “observable” or should I just say “observer” in QM?
Another good question. An observable is simply a dynamical value that one can measure (e.g. momentum, position, spin, angular momentum etc.). These are represented by hermitian operators because that enforces that the eigenvalues (what we measure) always be real
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And an "observer" in QM is nothing spooky. At the end of the day it means to measure an observable. So a really tiny slit that confines a photon to a small region of space can be said to have measured its location
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