2018
DOI: 10.1088/1367-2630/aa84de
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General measure for macroscopic quantum states beyond ‘dead and alive’

Abstract: We consider the characterization of quantum superposition states beyond the pattern 'dead and alive'. We propose a measure that is applicable to superpositions of multiple macroscopically distinct states, superpositions with different weights as well as mixed states. The measure is based on the mutual information to characterize the distinguishability between the multiple branches of the superposition. This allows us to overcome limitations of previous proposals, and to bridge the gap between general measures … Show more

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Cited by 2 publications
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