The universe is always sufficient to calculate itself. A multiverse has more computational capacity than a single universe—more to calculate , and more to calculate with.
Also, it’s a common misconception that there is a single MW, theory that requires irrevocable branching at every fundamental event.
One incorrect but frequently stated claim is that full decoherent splittng occurs at every microscopic interaction. This could be called the doubly maximal theory, the combination of the highest frequency and greatest extent of splitting. But If it were so, there would be no evidence of the various phenomena based coherent superposition,such as quantum computation. QC only works because branches, or rather, commentators a superposition, continue to influence each other and contribute toward final result. If the branching were complete and irreversible at The outset, the final result would.just be an observation of what had been happening in one branch. The doubly maximal concept of many worlds...full decoherence at every elementary interaction (not just observations, which are relatively high level interactions)...has been ruled out.
I have a basic understanding of QC. So in my understanding ok sometimes two branches can cancel each other out, or go back to the same state. Still, I would think there is enough “butterfly effect” type stuff that many worlds get split up to never meet again. And for each of those there’s a really small complex number.
If everything is a coherent superposition evolving according to the Schrödinger equation, there is very little cancellation or unwinding of “branches” ..But also no real branching, because superposed states continued to interact.
Decoherence, in the other hand, isn’t guaranteed to leave you with more than one branch.
The universe is always sufficient to calculate itself. A multiverse has more computational capacity than a single universe—more to calculate , and more to calculate with.
Also, it’s a common misconception that there is a single MW, theory that requires irrevocable branching at every fundamental event.
One incorrect but frequently stated claim is that full decoherent splittng occurs at every microscopic interaction. This could be called the doubly maximal theory, the combination of the highest frequency and greatest extent of splitting. But If it were so, there would be no evidence of the various phenomena based coherent superposition,such as quantum computation. QC only works because branches, or rather, commentators a superposition, continue to influence each other and contribute toward final result. If the branching were complete and irreversible at The outset, the final result would.just be an observation of what had been happening in one branch. The doubly maximal concept of many worlds...full decoherence at every elementary interaction (not just observations, which are relatively high level interactions)...has been ruled out.
I have a basic understanding of QC. So in my understanding ok sometimes two branches can cancel each other out, or go back to the same state. Still, I would think there is enough “butterfly effect” type stuff that many worlds get split up to never meet again. And for each of those there’s a really small complex number.
What is the butterfly effect mechanism?
If everything is a coherent superposition evolving according to the Schrödinger equation, there is very little cancellation or unwinding of “branches” ..But also no real branching, because superposed states continued to interact.
Decoherence, in the other hand, isn’t guaranteed to leave you with more than one branch.