The many-worlds interpretation implies that there are most likely an uncountable number of universes. It is one of a number of multiverse hypotheses in physics and philosophy. MWI views time as a many-branched tree, wherein every possible quantum outcome is realized.

Many-worlds interpretation David Deutsch argues that the way to understand the double-slit experiment is that in each universe the particle travels through a specific slit, but its motion is affected by the interference with particles in other universes. This creates the observable fringes.

Conclusion. The tenet of the Copenhagen Interpretation that charged particles have no material existence until they are subjected to measurement has no justification. It is based upon the false notion that if a particle has a probability distribution then it does not have a material existence.

Many worlds: The “locus” of each subject's conscious experiences is not the world as such, in a third-personal sense, but a subject-specific “first-personally centred world”. The first-personally centred worlds of different subjects can be viewed as distinct first-personal realizers of a shared “third-personal world”.