3 ms·
> the universal wave function splits into two "branches" which can't interact after the split. And how is that different from "wave function collapse"? How is
by Jensson 4y ago
> the universal wave function splits into two "branches" which can't interact after the split.
And how is that different from "wave function collapse"? How is that purer? To me that just looks like a wave function collapse with another name, and a whole slew of universes as extra garbage.
- mort96 4y agoThe difference is that it's something which already necessarily happens in quantum systems. Say you have two isolated particles A and B, and A is in a superposition between eigenstates 0 and 1. If those two particles interact, we say that they have formed a quantum system in a superposition between "A is in state 0 and B interacted with A in state 0" and "A is in state 1 and B interacted with state 1", right? MWI "simply" lets the same happen with observers. You have a particle in a superposition between states 0 and 1. You observe (i.e interact with) the particle, which puts the "you + particle" system in a superposition between "the particle was in state 0 and you observed the particle in state 0" and "the particle was in state 1 and you observed the particle in state 1". There is no wave function collapse mechanism, what we describe as "wave function collapse" is nothing more than the particles in the macro world becoming entangled with the particle we're testing.