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The stock many worlds hypothesis has a couple of really big problems. For one, the information content of the multiverse expands exponentially towards infinity
by CuriouslyC 8y ago
The stock many worlds hypothesis has a couple of really big problems. For one, the information content of the multiverse expands exponentially towards infinity. Second, it basically makes the amplitude of the wavefunction meaningless, since everything that can happen, does. If you make the assumption that the measure of the multiverse is fixed and quantized, things become a bit less conceptually problematic, but that breaks the math. Regardless, it still has the fewest problems among current paradigms.
- tbabb 8y ago> For one, the information content of the multiverse expands exponentially towards infinity. I don't agree. I would say that the biggest difference-- really, the fundamental difference-- between Everett and Copenhagen is that Everett says that the state evolution of the wave function is always unitary, while Copenhagen says that it's only unitary sometimes but not others (and don't ask about how to calculate which way it will act). Under unitary state evolution the volume of phase space is preserved and no information is globally created or destroyed. So the "branching" picture of Everett is not precisely correct, though it is handy language for building intuition. This should not be surprising because of complementary observables-- confining the state of one property will cause some other property to become proportionally unconfined, per Heisenberg.