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Can you do that for two systems that interfere? I think that is where the multiverse stuff comes from.
by ImHereToVote 4y ago
Can you do that for two systems that interfere? I think that is where the multiverse stuff comes from.
- evanb 4y agoWell, it depends on what you mean by "two systems". If they are described by one Hamiltonian the result is one path integral. In a relativistic quantum field theory, for example, one may describe systems of any number of particles. The path integral captures all the interference effects.