= Bose--Marletto--Vedral experiment
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The Bose--Marletto--Vedral experiment proposes placing two nearby masses in spatial superpositions and detecting the <entanglement> generated by their branch-dependent gravitational phases. Under locality assumptions and in the absence of other interactions, an entangling mediator must possess incompatible observables rather than behave as a single classical local variable.
https://arxiv.org/abs/1707.06050
https://arxiv.org/abs/1707.06036
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