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Physics 2003
A size criterion for macroscopic superposition statesDOI: 10.1088/1464-4266/6/11/001 Abstract: 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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