Journal
JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS
Volume 6, Issue 11, Pages 429-436Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1464-4266/6/11/001
Keywords
macroscopic superpositions; Schrodinger cat states; interference; disconnectivity
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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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