possible world interpretation (in quantum mechanics)

The possible world interpretation of quantum mechanics suggests that all possible outcomes of a quantum event are realized, but in separate, parallel "worlds." When a quantum system is measured, instead of collapsing into a single result, the universe splits into different branches, each representing a different outcome. So, every potential outcome occurs somewhere in this multiverse, with each "world" corresponding to a specific result. This interpretation helps explain quantum weirdness by proposing that all possibilities are equally real but inhabit different, non-communicating realities.