I can hear this post in their voices. Maybe I’ve seen the movie too many times…nah
this post was submitted on 28 Jul 2023
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Are the laws of physics different between each universe? In that case there’s a universe with no gravity…
Megamind would just be explaining an omniverse
Multiverse theory is based on quantum theory.
Observation of a selection of infinite “possibilities” results in collapse of the wave that encapsulates those possibilities into a single outcome.
You can have the electrons from an electron gun start all shooting into one direction based on whether it’s observed or not. And that’s because each electron is equally likely at all times to go in any direction along its waveform of possibilities. But it will never suddenly start firing lead particles or entire dogs.
The universe in which multiverse theory can’t work would be an isolated universe in which every outcome is already observed and quantum theory and waveforms like the ones discussed before can never be observed.
It doesn’t mean multiverse theory isn’t real, it just means that universe can’t ever even grasp the idea because it’s in a situation where it’s like a 1D person trying to understand a 3D world. There’s enough of a gap that it’s feasible that no intelligent life could ever come to the conclusion they’re an outlier.
Being a sample size of 1 is the most difficult hurdle to overcome in science. And in truth we’re also a sample size of 1 until we somehow manage to make contact with other universes.
Let's say the theory of infinite multiverses is correct This means that there must be a multiverse where a version of me is able to traverse the multiverse. Then if there is an infinite version of this verse, then surely one of them will choose to visit my verse. Therefore doesn't this disprove the infinite multiverse theory? As no one has visited me yet?
Or the laws of physics are just the same between all of the multiverses, and it's impossible to travel between them. Maybe the walls between universes are so thick that nobody will ever even detect that the other universes are there at all, making it basically the same as there being no other universes in the first place
There could be different laws of physics in this universe that makes it near impossible for somebody outside of it to visit. Or, from another perspective, would you wilingly visit yourself?
Well, no, for a few reasons:
We don't know that, if multiverses are real, that it is possible to travel between them. Infinite variations doesn't guarantee this, because that just effectively means that all possible universes exist. Were multiverse travel to turn out to be impossible, then nowhere in an infinite multiverse would it exist.
Smaller and larger infinities exist. If the set of universes where you exist is larger than the set of universes where you have multiverse travel, then most of the time, you won't be in a universe that gets you a visit, even though the number of both is infinite.
If the way the system works is that a new universe is created for each possibly each time something happens, then every time someone travels to a different universe, it will diverge into one where the visitor arrives, and one representing the option that the visitor does not arrive. No matter how much travelling is done, there will still be a set, indeed an infinite one, representing the scenario where no visitor arrives is what happens every single time any multiverse travel occurs. In that set of universes, you never have received any visits.