A common misconception—Jaynes railed against that idea too, and he wasn’t even equipped with the modern understanding of decoherence. In quantum mechanics, it’s an objective fact that the blobs of amplitude making up reality sometimes split in two, a
No it isn’t.
Decoherence as we observe it, is the dissapearance of coherence
Decoherence, as we observe it, is is not the generation of large “parallel worlds”. Decohered worlds other than ones own are by definition unobservable. Every experimenter witnessed a single world, so there has never over been an observation of multi-way decoherence. Decoherence could always or mostly generate a single universe, and everything would look the same.
No it isn’t.
Decoherence as we observe it, is the dissapearance of coherence Decoherence, as we observe it, is is not the generation of large “parallel worlds”. Decohered worlds other than ones own are by definition unobservable. Every experimenter witnessed a single world, so there has never over been an observation of multi-way decoherence. Decoherence could always or mostly generate a single universe, and everything would look the same.