In this website I have argued that the results of quantum measurements may be interpreted similarly to Everett’s Many Worlds Interpretation, but that

(1) universes don’t branch but are discrete and non-interacting (Everett’s universes do branch);

(2) the number of universes containing a given quantum outcome is proportionate to the Born probability of that outcome (instead, Everett places “weightings” on individual branches according to the Born probability);

(3) the number of universes in the multiverse is finite (the number of branches in Everett’s multiverse is infinite); and

(4) the component universes of the multiverse are finite spatially and temporally (Everett places no limit on the sizes and duration of individual branches).

I tried to avoid maths and jargon without compromising the message, and, indeed, I presented an alternative case to Everett’s for parallel worlds. Everett simply followed the mathematics of quantum superposition which, taken at face value, may be interpreted as a vast, burgeoning tree of branching universes. I have tried to make a more intuitive case for parallel universes, presented in the first three Steps, because it will be argued by some that for Everett to extend the mathematics of quantum mechanics to the whole universe (and multiverse) is stretching credibility too far.

However, for those wishing to see a more mathematical presentation of the argument for a finite multiverse of discrete, non-interacting, spatiotemporally finite parallel universes, I give you this link to a paper in the University of Pittsburgh’s PhilSci-Archive.