- #1
Quanundrum
- 40
- 13
There seems to be as many branches of Everettian QM as there are branches in Everettian QM. One of the things that never seem to be clarified by anyone is whether MWI is really just Modalism or not. I.E. whether *all worlds* happen *all the time*, or if there are specific conditions necessary. I re-read a thread I was part of regarding improbability in MWI and noticed a stark contrast between the participants.
One school of thought seems to advocate for modalism I.E. that everything happens all the time from all branches, and others indicate there are parameters.
To put this into perspective: everyone seems to agree that if MWI is true then a quantum measurement branches the world into all non-zero probabilities, making them actual. However, some say that since the entire universe is fundamentally made up of subatomic particles this means that right now on this branch we inhabit reading this sentence will branch further onto at least 1 where the sun spontaneously goes supernova or turns into a giant pumpkin. The latter seems absurd, but isn't it just a natural consequence of taking MWI *really* seriously?
One school of thought seems to advocate for modalism I.E. that everything happens all the time from all branches, and others indicate there are parameters.
To put this into perspective: everyone seems to agree that if MWI is true then a quantum measurement branches the world into all non-zero probabilities, making them actual. However, some say that since the entire universe is fundamentally made up of subatomic particles this means that right now on this branch we inhabit reading this sentence will branch further onto at least 1 where the sun spontaneously goes supernova or turns into a giant pumpkin. The latter seems absurd, but isn't it just a natural consequence of taking MWI *really* seriously?