which are really about a few (or a huge number of) particles behaving collectively like one particle. Things like that happen in particle physics too (e.g. a proton is not an elementary particle but the quarks that make it up are, the whole situation by which particles get their masses from the Higgs Boson involves some interacting particles and fields finding an eigenstate that doesn't interact, etc.)
But then you get the tabletop experiments like this which have some similarity to black holes
but have nothing to do with quantum gravity or the other tough problems w/ black hole theory. The experiment described here is nowhere near a resolution of the dark matter problem.
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[ 2.1 ms ] story [ 18.5 ms ] threadThere are all sorts of "particles" that exist in solid matter such as
https://en.wikipedia.org/wiki/Exciton https://en.wikipedia.org/wiki/Cooper_pair
which are really about a few (or a huge number of) particles behaving collectively like one particle. Things like that happen in particle physics too (e.g. a proton is not an elementary particle but the quarks that make it up are, the whole situation by which particles get their masses from the Higgs Boson involves some interacting particles and fields finding an eigenstate that doesn't interact, etc.)
But then you get the tabletop experiments like this which have some similarity to black holes
https://arxiv.org/abs/1409.6550
but have nothing to do with quantum gravity or the other tough problems w/ black hole theory. The experiment described here is nowhere near a resolution of the dark matter problem.
https://www.math.columbia.edu/~woit/wordpress/?p=12936