I should do better. Therefore, short 🧵! Traditional quantum mechanics, a la Bohr/Heisenberg and codified by von Neumann, posits two different kinds of quantum evolution. The system obeys the Schrödinger equation, *except* when it is measured. Two processes: unitary evolution, and measurement. (1/n)

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I love a good quantum thread

I admit: I never understood the „problem“ part of the measurement problem. I would say, a measurement is an interaction that entangles two systems. If you lose the phase relation between possibilities (in further interactions with stuff) that state looks classical. Where is the problem?

Inarbuably, adv. - the claim that an argument cannot be disputed by the "Sir, this is an Arby's" rebuttal bsky.app/profile/sean...

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But what exactly is a "measurement," and when does one occur? Good question! That is the "quantum measurement problem." Traditional QM simply punts on these questions. (2/n) www.youtube.com/watch?v=-kxm...

Sean Carroll explains: what is the measurement problem in quantum mechanics?

YouTube video by Science & Cocktails