On 6/12/2018 3:31 PM, [email protected] wrote:
*As I see it, the total system represented by the wf ( (Alive, Undecayed) + (Dead, Decayed) ), leaving out Dirac symbols, must be isolated if it's regarded as a superposition. If so, this implies the cat is also isolated. AG *
Being "regarded as a superposition" is just choosing a coordinate system. If I choose up/down as the basis vectors of my Hibert space for an SG then a left or right polarized electron will be in a superposition of up/down. When Zurek talks about being "entangled with the environment" he just means the basis of the environment eigenstates, for any operator we could create, is unknown and unknowable. So the measuring system is in a superposition with the environment, but it's complicated and we don't know what it is; so we treat it classically.
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