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> Local hidden variables have been ruled out. Superdeterminism is a local hidden variable theory, that has not been ruled out. Superdeterminism circumvents the
by sampo 4y ago
> Local hidden variables have been ruled out.
Superdeterminism is a local hidden variable theory, that has not been ruled out. Superdeterminism circumvents the Bell's theorem, by extending determinism not only to the things being measured, but also to the entities doing the measurements.
- lmm 4y agoSuperdeterminism isn't really local. It requires assuming that certain physical configurations are impossible for completely nonlocal and unobservable reasons (i.e. it's impossible for you to decide to measure this particle that you received from 1 light year away in this particular way, for reasons that no local measurement could ever possibly tell you - defenders will argue that it's "local" because those reasons were created when the particle was and came along with it when it was sent to you, but that's a fundamentally unphysical way of thinking).
- throwawaymaths 4y agoI think it's detractors that argue that it's local, because that forces it to be impossible as per bells theorem.
- lmm 4y agoThat would be a poor argument to make, because clearly the maths of superdeterminism does work. It's just the whole concept that's insane.
- lupire 4y agoMore or less insane than Many Worlds? or supernaturally random Wave Function collapse?
- lmm 4y agoFar more insane than either.
- throwawaymaths 4y agoWhat exactly is the definition of sanity? I'm not sure that it's sane that the laws of physics are the same from moment to moment
- sampo 4y ago> Superdeterminism isn't really local. In this context, "local" means: No spooky action that is faster than light. However spooky you might think the superdeterministec correlations are, superdeterminism implements them entirely without breaking the speed of light, so in the established terminology, it is local.
- lmm 4y agoTechnically yes, but only by positing a spooky magic correlation that is unobservable and obeys no regular physical law. I mean, you can produce a theory that's equivalent to superdeterminism by taking a regular nonlocal hidden variable theory and saying "no, the information doesn't travel faster than light, it travels backwards in time along one particle's worldline to the point where the particles were together and then forward in time along the other particle's worldline, so that it ends up in a different place at the same time. Totally different from travelling faster than light!"
- lupire 4y agoYes, superdeterminism is a theory that local and nonlocal hidden variables are the same. Remember, Pell's inequality theorem is definitely true, mathematicallly. The only way to disagree with it physically is to say that the premises are not physical on our Universe.