Worlds are weighted by squared-norm of amplitude, a quantity that is conserved. If two worlds are really not interfering with each other any more, then amplitude will not somehow vanish from the future of one and appear in the future in the other.
Worlds are weighted by squared-norm of amplitude, a quantity that is conserved. If two worlds are really not interfering with each other any more, then amplitude will not somehow vanish from the future of one and appear in the future in the other.