I wish you luck with your quantum effort.
There is few things that previous explanations miss or explain badly, I hope you could dive into them more deeply:
1) quantum decoherence,
2) the fact that QM is symmetrical in time.
QM and its time indifference time is really fascinating subject. For example, many-worlds interpretation fails to mention that it works equally well into the past. If you entertain the many-worlds interpretation, you must acknowledge that it works as well backwards in time. From any "current", moment there are multiple histories backward (with thermodynamic constraints, of course)