A size criterion for macroscopic superposition states

Details A size criterion for macroscopic superposition states A size criterion for macroscopic superposition states

2003-10-31

arxiv.org/abs/quant-ph/0310193v2

Physics

Quantum Physics

LaTeX2e-REVTeX4, 9 pages, 3 figures. V2: introduction and discussion slightly altered

Scientific paper

10.1088/1464-4266/6/11/001

An operational measure to quantify the sizes of some ``macroscopic quantum superpositions'', realized in recent experiments, is proposed. The measure is based on the fact that a superposition presents greater sensitivity in interferometric applications than its superposed constituent states. This enhanced sensitivity, or ``interference utility'', may then be used as a size criterion among superpositions.

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