Potential crank warning; non-physicist proposing experiments. Sorry if I'm way off-base here, please let me know where I've gone wrong.
I was contemplating MWI and dark matter, and wondered if dark matter was just the gravitational influence of matter in other universes, where the other universes' matter is distributed differently to ours.
Google tells me that others have proposed theories like this, but I can't find if anyone has ever tried to test it.
Has anyone ever tried to test this directly? We have gravimeters sensitive enough that one "detected ... (read more)
There have been some similar ideas, but not related to MWI - as DanielLC says, the "distance" that separates two different states of the universe does not behave like we commonly imagine distance between "parallel worlds" to behave.
However, something that can behave like that is these extra spatial dimensions proposed by string theory, brane theory, etc. See wikipedia. I'm sure someone has proposed this as an explanation for dark matter.
5DanielLC
MWI doesn't work that way. Universes are close iff the particles are in about the same place.
2[anonymous]
Is this the sort of experiment in which you would need macroscopically different 'universes' separated from each other by single quantum events, such that the thermal noise/interaction with the environment of the large experimental mass must be dealt with?
Potential crank warning; non-physicist proposing experiments. Sorry if I'm way off-base here, please let me know where I've gone wrong.
I was contemplating MWI and dark matter, and wondered if dark matter was just the gravitational influence of matter in other universes, where the other universes' matter is distributed differently to ours. Google tells me that others have proposed theories like this, but I can't find if anyone has ever tried to test it.
Has anyone ever tried to test this directly? We have gravimeters sensitive enough that one "detected ... (read more)