极值Majorana星座极限下的量子精密测量
Quantum metrology at the limit with extremal Majorana constellations
摘要：
量子精密测量允许极大地提高各种物理参数的测量精度。旋转的估计构成了这种量子增强精度的一个显著例子。最近引入的量子之王在旋转轴未知时特别适合这项任务，因为它们具有独立于该轴的灵敏度，并且它们实现了海森堡极限标度。在这里，我们报告这些国家的实验实现产生高达21维的轨道角动量状态的单光子，并确认其高可分辨性。
英文摘要：
Quantum metrology allows for a tremendous boost in the accuracy of measurement of diverse physical parameters. The estimation of a rotation constitutes a remarkable example of this quantum-enhanced precision. The recently introduced Kings of Quantumness are especially germane for this task when the rotation axis is unknown, as they have a sensitivity independent of that axis and they achieve a Heisenberg-limit scaling. Here, we report the experimental realization of these states by generating up to 21-dimensional orbital angular momentum states of single photons, and confirm their high metrological abilities.
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