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DOE OSTI · 2573637

Quantum-enhanced distributed phase sensing with a truncated SU(1,1) interferometer

Hong, Seongjin [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Yonsei Univ., Seoul (Korea, Republic of)]·Feldman, Matthew A. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000240715284)·Marvinney, Claire E. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)]·Lee, Donghwa [Korea Institute of Science and Technology (KIST), Seoul (Korea, Republic of)]·Lee, Changhyoup [Korea Institute of Science and Technology, Seoul (Korea)] (ORCID:0000000214014230)·Febbraro, Michael T. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000203472260)·Marino, Alberto M. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000153771122)·Pooser, Raphael C. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000022922453X)
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Abstract

In recent years, distributed quantum sensing has gained interest for a range of applications requiring networks of sensors, from global-scale clock synchronization to high energy physics. In particular, a network of entangled sensors can improve not only the sensitivity beyond the shot noise limit, but also enable a Heisenberg scaling with the number of sensors. Here, using bright entangled twin beams, we theoretically and experimentally demonstrate the detection of a linear combination of two distributed phases beyond the shot noise limit with a truncated SU(1,1) interferometer. Specifically, we show a quantum noise reduction of 1.7 ± 0.3 dB below what is possible with the corresponding classical configuration. Additionally, we theoretically extend the use of a truncated SU(1,1) interferometer to a multi-phase-distributed sensing scheme that leverages entanglement as a resource to achieve a quantum improvement in the scaling with the number of sensors in the network. Our results pave the way for developing quantum-enhanced sensor networks that can achieve an entanglement-enhanced sensitivity.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICSOptical quantum information processingQuantum information processing with continuous variablesQuantum metrologyQuantum parameter estimation

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Hong, Seongjin [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Yonsei Univ., Seoul (Korea, Republic of)], Feldman, Matthew A. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000240715284), Marvinney, Claire E. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)], Lee, Donghwa [Korea Institute of Science and Technology (KIST), Seoul (Korea, Republic of)], Lee, Changhyoup [Korea Institute of Science and Technology, Seoul (Korea)] (ORCID:0000000214014230), Febbraro, Michael T. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000203472260), Marino, Alberto M. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000153771122), Pooser, Raphael C. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000022922453X). 2025-06-05. Quantum-enhanced distributed phase sensing with a truncated SU(1,1) interferometer. https://doi.org/10.1103/physrevresearch.7.023231

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