Measurement scheme for purity based on two two-body gates

Hiromichi Nakazato, T. Tanaka, Kazuya Yuasa, G. Florio, S. Pascazio

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two √swap gates and hinges only on measurements performed on a reference system, prepared in a certain pure state and coupled with the target system. Neither tomographic methods, with the complete reconstruction of the state, nor interferometric setups are needed.

    Original languageEnglish
    Article number042316
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Volume85
    Issue number4
    DOIs
    Publication statusPublished - 2012 Apr 16

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    purity
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    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Measurement scheme for purity based on two two-body gates. / Nakazato, Hiromichi; Tanaka, T.; Yuasa, Kazuya; Florio, G.; Pascazio, S.

    In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 85, No. 4, 042316, 16.04.2012.

    Research output: Contribution to journalArticle

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