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faen
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I've been reading a bit about quantum decoherence today. But I'm stuck on the following contradictions:
I think I've read somewhere that after the wave function collapses, it will resume its normal superpositioned state soon after measurement. But according to quantum decoherence a superposition splitting into its sub states is thermodynamically irreversible. So how does the system resume to its "irreversible" state then? Does it somehow resume to its original state just by existing in its energy potential and then become a superposition of other similar substates?
Also some places i read that the substates of the particle are still in the same superposition of the particle even after measurement. At the same time i read that in order to be in a superposition, the sub states need to be in phase. But when the sub states of the particle entangle with the environment they change their phases. So how can they still constitute the superposition of the whole particle when they are out of phase?
Also, why isn't the "many worlds interpretation" useless when quantum decoherence predicts how the possibilities that were not measured still exist in our universe (entangled into the environment)?
I'd appreciate if anybody could clear out whatever i have missunderstood :)
I think I've read somewhere that after the wave function collapses, it will resume its normal superpositioned state soon after measurement. But according to quantum decoherence a superposition splitting into its sub states is thermodynamically irreversible. So how does the system resume to its "irreversible" state then? Does it somehow resume to its original state just by existing in its energy potential and then become a superposition of other similar substates?
Also some places i read that the substates of the particle are still in the same superposition of the particle even after measurement. At the same time i read that in order to be in a superposition, the sub states need to be in phase. But when the sub states of the particle entangle with the environment they change their phases. So how can they still constitute the superposition of the whole particle when they are out of phase?
Also, why isn't the "many worlds interpretation" useless when quantum decoherence predicts how the possibilities that were not measured still exist in our universe (entangled into the environment)?
I'd appreciate if anybody could clear out whatever i have missunderstood :)
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