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What proof is there of the multiverse?
(sh.itjust.works)
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this post was submitted on 03 Aug 2025
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It is, however, actually simpler than other theories, in that if you just let quantum mechanics do it's thing without extra (unknown) parts to limit it, it produces many worlds. So, by Occam's razor...
Specifically:
Quantum systems are in more than one classical state at a time, unavoidably. You can see this in the double slit experiment. Even if you send a single particle at a time through the slits, it passes through both and creates the interference pattern. (There's also ways to formally prove that making quantum mechanics normal would require fate, or faster-than-light trickery which would actually be worse than fate)Early physicists were very confused by this. The Schrodinger's cat was used as a thought experiment meant to illustrate how that's absurd, and it was decided there must be something that causes quantum states to "collapse" to one state before they can cause any trouble.
That's not definitely wrong, and it's still debated in versions by modern theorists, but it turned out not to be necessary. The reason for that is that if a part of a quantum system becomes entangled with something outside of it, the interference will no longer happen, and it becomes indistinguishable from multiple slightly different copies of the same system.
That is a misinterpretation of the double slit experiment results, it’s way simpler than any of that. They were using photons, which is what causes us to see by being absorbed by our eyes or any sort of camera or observation device, the difference in impact patterns were simply the photons being absorbed or not. There is no sort of wave collapse or multiverse nonsense, the photons absorbed by film or eyes were just not impacting the surface because they were absorbed elsewhere, causing less friction between the photons and changing the patterns on the surface.
The Schrodinger thought experiment was intended to point out the ridiculousness of observation theory being applied in quantum theory, not an attempt to prove it.
No, it's not. Exactly one photon (or electron) still arrives. You can refer to Wikipedia for this one. And refer to the no-go theorems if you're trying to push a homebrew hidden variable theory.
Yes, which is why they had to come up with collapse, and later multiple worlds theory. Just not doing QM isn't an option.
Many Worlds ~~Theory~~ interpretation is nonsense, and nothing about anything you’ve said establishes any sort of proof for it.
How did you become so arrogant about a subject you've clearly never bothered to do even the most cursary reading on? Your claims about the double slit experiment are contrary not just to Many Worlds, but to quantum physics in it's entirety.
I don't know where to start. There are so many things wrong with this comment that I'm confused as to how you even became confident enough about these falsehoods to write them. Where in the world did you get this idea of the Double Slit Experiment?
Just to be clear, what you are saying is literally that Quantum Physics in general is false, which flys in the face of the last century of science. This is literally flat earth tier