AFAIK a fundamental step in any quantum computing algorithm is bringing the qubits back to a state with a nonrandom outcome (specifically, the answer to the pro

AFAIK a fundamental step in any quantum computing algorithm is bringing the qubits back to a state with a nonrandom outcome (specifically, the answer to the problem being solved). Thus a "good" quantum computer does not bifurcate the wavefunction at a macro level, ie there is no splitting of the "multiverse" after the calculation.