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> the act of you performing a measurement does not have a definition in the form of the wavefunction interacting with itself somehow Performing a measurement j
by canjobear 3y ago
> the act of you performing a measurement does not have a definition in the form of the wavefunction interacting with itself somehow
Performing a measurement just means you become entangled with the thing you’re measuring.
https://en.m.wikipedia.org/wiki/Quantum_decoherence https://en.m.wikipedia.org/wiki/Quantum_decoherence
- pixl97 3y agoAnd the thing you're measuring is already entangled with the messy universe around it...
- golol 3y agoI didn't know that quantum decoherence tackles the measurement problem. It seems like quite an intuitive explanation and does preserve a global wavefunction. Perhaps this doesn't quite count this as "standard quantum mechanics though. As I understand there is a very tight-knit theory consisting of a mathematical model (Measurements are self adjoint operators on a Hilbert spaces, unitary evolution given bx the hamiltonian, states are unit vectors or POVMs.) together with a physical interpretation that amazingly fits the observations. This + quantum decoherence seems more in the realm of mathematical theory with a nice interpretation and some experimental evidence.