Macroscopicity of Mechanical Quantum Superposition States

Abstract

We propose an experimentally accessible, objective measure for the macroscopicity of superposition states in mechanical quantum systems. Based on the observable consequences of a minimal, macrorealist extension of quantum mechanics, it allows one to quantify the degree of macroscopicity achieved in different experiments.

arXiv comment11 pages, 2 figures. v2: Corresponds to the published version, except for a different numbering of the references. The published "Supplemental Material" is included as an appendix

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