Nanoradian-Scale Precision in Light Rotation Measurement via Indefinite Quantum Dynamics

• URL: http://arxiv.org/abs/2310.07125v3
• Date: Wed, 24 Apr 2024 07:15:53 GMT
• Title: Nanoradian-Scale Precision in Light Rotation Measurement via Indefinite Quantum Dynamics
• Authors: Binke Xia, Jingzheng Huang, Hongjing Li, Zhongyuan Luo, Guihua Zeng,
• Abstract summary: A nanoradian-scale precision of light rotation measurement is achieved in the experiment. This scheme holds promise in various optical applications due to the diverse range of manipulable resources offered by photons.
• Score: 0.5615696147680801
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The manipulation and metrology of light beams are pivotal for optical science and applications. In particular, achieving ultra-high precision in the measurement of light beam rotations has been a long-standing challenge. Instead of utilizing quantum probes like entangled photons, we address this challenge by incorporating a quantum strategy called "indefinite time direction" into the parameterizing process of quantum parameter estimation. Leveraging this quantum property of the parameterizing dynamics allows us to maximize the utilization of OAM resources for measuring ultra-small angular rotations of beam profile. Notably, a nanoradian-scale precision of light rotation measurement is finally achieved in the experiment, which is the highest precision by far to our best knowledge. Furthermore, this scheme holds promise in various optical applications due to the diverse range of manipulable resources offered by photons.

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