If different worlds didn’t interact, you wouldn’t even get the ordinary double-slit result. With ordinary probability, you can split off branches without a problem, but quantum amplitudes can be negative or complex, they can cancel out, etc. You just don’t typically see this macroscopically due to decoherence.
If different worlds didn’t interact, you wouldn’t even get the ordinary double-slit result. With ordinary probability, you can split off branches without a problem, but quantum amplitudes can be negative or complex, they can cancel out, etc. You just don’t typically see this macroscopically due to decoherence.