The background as a quantum observable: Einstein's hole argument in a quasiclassical context

Details The background as a quantum observable: Einstein's hole argument in a quasiclassical context The background as a quantum observable: Einstein's hole argument in a quasiclassical context

2009-09-08

arxiv.org/abs/0909.1408v2

Physics

Quantum Physics

Scientific paper

I consider a thought experiment measuring the decoherence for quasiclassical superpositions of gravitational field. A version of the hole argument allows to prove that a covariant (background-free) theory is completely unable to define the outcome of this experiment and is therefore not viable. Instead, the results of experiments of this type allow to reconstruct a common background shared by all superposed gravitational fields.

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