There is an approach to MWI based on coherent superpositions, and a version based on decoherence. These are incompatible opposites
They’re not opposites, they’re two different ways of analyzing the same situation. Examining the local density matrices at various places, we may find decoherence has occurred, even while the global state is in a coherent superposition.
They’re not opposites, they’re two different ways of analyzing the same situation. Examining the local density matrices at various places, we may find decoherence has occurred, even while the global state is in a coherent superposition.
Local decoherence with global coherence is hardly many worlds. Global decoherence with local coherence would be a much better fit.