Physics, 23.08.2019 05:10, dalechloe5596

What is the difference between a pure state and a mixed state?
2) so at t0, if i performed simultaneous measurment of a complete set of compatible variables on a system, how would a pure state differ from a mixed state?
3) for example a particle in a box, whould this be considred a pure state or a mixed one?
4) lastly how would |psi> evolve for both pure and mixed states after a measurement os performed ?

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What is the difference between a pure state and a mixed state?
2) so at t0, if i performed si...