Detecting quantumness in uniform precessions

• URL: http://arxiv.org/abs/2204.10498v3
• Date: Mon, 26 Sep 2022 16:10:05 GMT
• Title: Detecting quantumness in uniform precessions
• Authors: Lin Htoo Zaw, Clive Cenxin Aw, Zakarya Lasmar, and Valerio Scarani
• Abstract summary: We present a family of protocols that detect the nonclassicality of suitable states of a single quantum system. We then apply the protocols to finite-dimensional spins that undergo uniform precession in real space.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Building on work by Tsirelson, we present a family of protocols that detect the nonclassicality of suitable states of a single quantum system, under the sole assumption that the measured dynamical observable undergoes a uniform precession. The case of the harmonic oscillator was anticipated in the work by Tsirelson, which we extend. We then apply the protocols to finite-dimensional spins that undergo uniform precession in real space and find a gap between the classical and the quantum expectations for every $j\geq \frac{3}{2}$ (excluding $j=2$).

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