I was always wondering about MWI and couldn't find the answer to one question. AFAIK Everett never mentioned Many Worlds in his paper. What he was talking about was a Universal Wave Function. In that sense, 'world' is just a 'quantum system', not 'Universe'. At what stage we started calling it Many Worlds?
When scientists say Many Worlds, do they actually mean Worlds as physical 'parallel universes' that pop up into existence?
Or they only mean that those are probable outcomes of our measurement (probable histories) that never actually happened (only one of them happened - the one we end up being it)?
When scientists say Many Worlds, do they actually mean Worlds as physical 'parallel universes' that pop up into existence?
Or they only mean that those are probable outcomes of our measurement (probable histories) that never actually happened (only one of them happened - the one we end up being it)?