Memory-Assisted Nonlocal Interferometer toward Long-Baseline Telescopes

Bin Wang; Xi-Yu Luo; Bo-Feng Gao; Jian-Long Liu; Chao-Yang Wang; Zi Yan; Qiao-Mu Ke; Da Teng; Ming-Yang Zheng; Yuan Cao; Jun Li; Cheng-Zhi Peng; Qiang Zhang; Xiao-Hui Bao; Jian-Wei Pan

doi:10.1103/qpzn-h7p9

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Memory-Assisted Nonlocal Interferometer toward Long-Baseline Telescopes

Bin Wang ^1,2,3,*, Xi-Yu Luo ^1,2,3,*, Bo-Feng Gao ^4,*, Jian-Long Liu ^1,2,3, Chao-Yang Wang^1,2,3, Zi Yan^1,2,3, Qiao-Mu Ke^1,2,3, Da Teng ^1,2,3, Ming-Yang Zheng^4,3 et al.

Yuan Cao^1,2,3, Jun Li ^1,2,3, Cheng-Zhi Peng^1,2,3, Qiang Zhang^1,2,3,4, Xiao-Hui Bao ^1,2,3, and Jian-Wei Pan^1,2,3

¹Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
²CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
³Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
⁴Jinan Institute of Quantum Technology, Jinan 250101, China

^*These authors contributed equally to this work.

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Phys. Rev. Lett. 136, 240801 – Published 17 June, 2026

DOI: https://doi.org/10.1103/qpzn-h7p9

Abstract

Quantum networks and remote quantum entanglement serve as vital future quantum communication resources with broad applicability. A key direction lies in extending the baseline of optical interferometers to enhance angular resolution in interferometric imaging. Here, by measuring a simulated thermal light field, we report the demonstration of a memory-assisted nonlocal interferometer achieving a fiber-link baseline up to 20 km while simultaneously showing its capability to compensate for a geometric delay equivalent to 1.5 km. This result demonstrates potential for enhancing the angular resolution of interferometric imaging in the optical band with delocalized single-photon entanglement, and paves the way for future application of quantum memories in astronomical observation.

Physical Review Letters

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Memory-Assisted Nonlocal Interferometer toward Long-Baseline Telescopes

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