论文标题
高速检测1550 nm单光子，具有超导纳米线检测器
High-speed detection of 1550 nm single photons with superconducting nanowire detectors
论文作者
论文摘要
超导纳米线单光子检测器是量子信息和科学的关键技术，因为它们的效率很高，计时抖动低和黑暗计数低。在这项工作中，我们为单个1550 nm光子提供了一个检测器，其检测效率高达78％，定时抖动低于50 PS FWHM，158/s的黑暗计数率 - 以及在3 dB压缩下的1.5 giga-counts/s的最大最大计数。 PEACOQ检测器（用于计数光学量子的性能增强阵列）包括跨越光纤模式的32个直线超导氮化物纳米线的线性阵列。该设计支持高计数率，对检测效率和时机抖动的惩罚最小。我们通过为每种纳米线实施独立读取以及使用暂时的步行校正技术来减少依赖计数率依赖的时机抖动来显示这些权衡如何缓解这些权衡。这些探测器使量子通信在10 GHz时钟上实用。
Superconducting nanowire single photon detectors are a key technology for quantum information and science due to their high efficiency, low timing jitter, and low dark counts. In this work, we present a detector for single 1550 nm photons with up to 78% detection efficiency, timing jitter below 50 ps FWHM, 158 counts/s dark count rate - as well as a world-leading maximum count rate of 1.5 giga-counts/s at 3 dB compression. The PEACOQ detector (Performance-Enhanced Array for Counting Optical Quanta) comprises a linear array of 32 straight superconducting niobium nitride nanowires which span the mode of an optical fiber. This design supports high count rates with minimal penalties for detection efficiency and timing jitter. We show how these trade-offs can be mitigated by implementing independent read-out for each nanowire and by using a temporal walk correction technique to reduce count-rate dependent timing jitter. These detectors make quantum communication practical on a 10 GHz clock.
