@article{BUZEK:1995:10.1103/PhysRevA.51.2594,
author = {BUZEK, V and KEITEL, CH and KNIGHT, PL},
doi = {10.1103/PhysRevA.51.2594},
journal = {Physical Review A: Atomic, Molecular and Optical Physics},
pages = {2594--2601},
title = {Sampling entropies and operational phase-space measurement. II. Detection of quantum coherences},
url = {http://dx.doi.org/10.1103/PhysRevA.51.2594},
volume = {51},
year = {1995}
}

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TY  - JOUR
AB  - We use the operational phase-space distributions and sampling entropies developed in the preceding paper [V. Buek, C. H. Keitel, and P. L. Knight, Phys. Rev. A 51, 2575 (1995)] to discuss the nature of quantum interference between components of superpositions of states. We show how the Wehrl entropy, a special case of the sampling entropy, is a useful discriminator between different kinds of superpositions and of statistical mixtures, and is determined essentially by the coherent-state content. Apart from interference terms, this content is given by the quantum uncertainty of a single coherent state and the classical contribution to the number of coherent states necessary to tile the dominant phase-space ‘‘patch’’ representing the quantum state of interest. We illustrate these ideas using nonclassical superpositions of coherent states, where interference modifies the phase-space distributions, and show how these features are sensitive to dissipation.
AU  - BUZEK,V
AU  - KEITEL,CH
AU  - KNIGHT,PL
DO  - 10.1103/PhysRevA.51.2594
EP  - 2601
PY  - 1995///
SN  - 1050-2947
SP  - 2594
TI  - Sampling entropies and operational phase-space measurement. II. Detection of quantum coherences
T2  - Physical Review A: Atomic, Molecular and Optical Physics
UR  - http://dx.doi.org/10.1103/PhysRevA.51.2594
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1995QN23100103&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - http://hdl.handle.net/10044/1/404
VL  - 51
ER  - 

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