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.
@article{arxiv.2511.10988,
title = {Memory-Assisted Nonlocal Interferometer Towards Long-Baseline Telescopes},
author = {Bin Wang and Xi-Yu Luo and Bo-Feng Gao and Jian-Long Liu and Chao-Yang Wang and Zi Yan and Qiao-Mu Ke and Da Teng and Ming-Yang Zheng and Yuan Cao and Jun Li and Cheng-Zhi Peng and Qiang Zhang and Xiao-Hui Bao and Jian-Wei Pan},
journal= {arXiv preprint arXiv:2511.10988},
year = {2025}
}
Comments
6 pages in the main text, 7 pages in the supplemental meterial