RQC Seminar

22nd RQC Seminar

  • 講演者

    Prof. Valerio Scarani
    (Centre for Quantum Technologies and National University of Singapore)

  • 日程


  • 開催場所

    ハイブリッド(Zoom ・ 理研 和光事業所 本部棟2階 大会議室)

  • 講演タイトル

    Dynamics-based certification of quantumness and entanglement

  • お問合せ


The fact that harmonic oscillators exhibit proper quantum features is literally textbook knowledge. It is also believed that such features are not to be found in the dynamics, because both in classical and in quantum mechanics, the evolution in time is a simple precession. Contrary to this belief, we present a family of protocols that detect the non-classicality of suitable states of a single quantum system, under the sole assumption that its time evolution is a uniform precession. The case of the harmonic oscillator, where the precession happens in phase space and couples position and momentum, was anticipated in an unnoticed work by Tsirelson, which we extend. When the precessing system is composite, we study when the violation of the classical bound for one of the normal modes implies entanglement of the physical oscillators. We also extend these results for finite-dimensional spins that undergo uniform precession in real space.


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