Heisenberg-limited quantum metrology using 100-photon Fock states

• URL: http://arxiv.org/abs/2306.16919v1
• Date: Thu, 29 Jun 2023 13:12:26 GMT
• Title: Heisenberg-limited quantum metrology using 100-photon Fock states
• Authors: Xiaowei Deng and Sai Li and Zi-Jie Chen and Zhongchu Ni and Yanyan Cai and Jiasheng Mai and Libo Zhang and Pan Zheng and Haifeng Yu and Chang-Ling Zou and Song Liu and Fei Yan and Yuan Xu and Dapeng Yu
• Abstract summary: We develop a programmable photon number filter that efficiently generates Fock states with up to 100 photons in a high-quality superconducting microwave cavity. We demonstrate a precision scaling close to the Heisenberg limit and achieve a maximum metrological gain of up to 14.8 dB.
• Score: 11.376914882465812
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum metrology has emerged as a promising avenue for surpassing the limitations of classical mechanics in high-precision measurements. However, the practical implementation of quantum metrology is hindered by the challenges of manipulating exotic quantum states in large systems. Here, we propose and demonstrate a hardware-efficient approach to achieve Heisenberg-limited quantum metrology using large photon-number Fock states. We have developed a programmable photon number filter that efficiently generates Fock states with up to 100 photons in a high-quality superconducting microwave cavity. Using these highly nontrivial states in displacement and phase measurements, we demonstrate a precision scaling close to the Heisenberg limit and achieve a maximum metrological gain of up to 14.8 dB. Our hardware-efficient quantum metrology can be extended to mechanical and optical systems and provides a practical solution for high metrological gain in bosonic quantum systems, promising potential applications in radiometry and the search for new particles.

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