Signatures for Generalized Macroscopic Superpositions | Zendy

Eric G. Cavalcanti | Zendy; M. D. Reid | Zendy

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Signatures for Generalized Macroscopic Superpositions

Author(s) -

Eric G. Cavalcanti,

M. D. Reid

Publication year - 2006

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.97.170405

Subject(s) - physics , statistical physics , coherence (philosophical gambling strategy) , pointer (user interface) , gaussian , eigenvalues and eigenvectors , quantum , quantum entanglement , quantum mechanics , computer science , artificial intelligence

We develop criteria sufficient to enable detection of macroscopic coherencewhere there are not just two macroscopically distinct outcomes for a pointermeasurement, but rather a spread of outcomes over a macroscopic range. Thecriteria provide a means to distinguish a macroscopic quantum description froma microscopic one based on mixtures of microscopic superpositions ofpointer-measurement eigenstates. The criteria are applied to Gaussian-squeezedand spin-entangled states.Comment: 4 pages, 2 figures, some changes mad

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