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A groundbreaking advancement in multi-photon spatial coincidence detection has been achieved by a team from the Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, led by You Lixing and Li Hao. On January 30, 2025, their research titled "Superconducting Nanowire Two-Photon Spatial Coincidence Counter with Combined Temporal Logic and Amplitude Multiplexing" was published in the prestigious journal Nature Photonics. This achievement surpasses the limitations of signal aliasing on the delay line, enabling the comprehensive analysis of all single-photon and two-photon events within a 16-channel structure. This innovation promises to bolster multi-spatial state coincidence detection in the realm of optical quantum computing.
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