Experimental study of a subsystem in an entangled two-photon state

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dc.contributor.authorStrekalov, D. V.
dc.contributor.authorKim, Yoon-Ho
dc.contributor.authorShih, Yanhua
dc.date.accessioned2025-08-28T16:10:04Z
dc.date.issued1999-10-01
dc.description.abstractThe state of a signal-idler photon pair of spontaneous parametric down-conversion is a typical nonlocal entangled pure state with zero entropy. The precise correlation of the subsystems is completely described by the state. However, it is an experimental choice to study only one subsystem and to ignore the other. What can we learn about the measured subsystem? Results of this kind of measurements look peculiar. The experiment confirms that the two subsystems are both in mixed states with entropy greater than zero. One can only obtain statistical knowledge of the subsystems in this kind of measurement.
dc.description.sponsorshipThis work was supported, in part, by the U.S. Office of Naval Research and by the National Security Agency.
dc.description.urihttps://link.aps.org/doi/10.1103/PhysRevA.60.2685
dc.format.extent4 pages
dc.genrejournal articles
dc.identifierdoi:10.13016/m22wgs-wd31
dc.identifier.citationStrekalov, Dmitry V., Yoon-Ho Kim, and Yanhua Shih. "Experimental Study of a Subsystem in an Entangled Two-Photon State". Physical Review A 60, no. 4 (1999): 2685–88. https://doi.org/10.1103/PhysRevA.60.2685.
dc.identifier.urihttps://doi.org/10.1103/PhysRevA.60.2685
dc.identifier.urihttp://hdl.handle.net/11603/39890
dc.language.isoen
dc.publisherAPS
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Student Collection
dc.rights©1999 American Physical Society
dc.subjectUMBC Quantum Optics Laboratory
dc.titleExperimental study of a subsystem in an entangled two-photon state
dc.typeText

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