The interpretations of quantum mechanics that this sort of experiment tests are not all of the same ones as the ones Eliezer argues against. You can have “one world” interpretations that appear exactly identical to many-worlds, and indeed that’s pretty typical.
Maybe I should have written this in reply to the original post.
Here’s some evidence for macroscopic decoherence.
The interpretations of quantum mechanics that this sort of experiment tests are not all of the same ones as the ones Eliezer argues against. You can have “one world” interpretations that appear exactly identical to many-worlds, and indeed that’s pretty typical.
Maybe I should have written this in reply to the original post.
Actually, this is evidence for making a classical object behave in a quantum way, which seems like the opposite of decoherence.
I don’t understand your point. How would you demonstrate macroscopic decoherence without creating a coherent object which then decoheres?