量子通信器件

研究方向

量子通信克服了经典加密技术内在的安全隐患,是迄今为止唯一被严格证明是无条件安全的通信方式。量子通信系统中最重要的器件包括单光子探测器、量子随机数发生器、以及单光子频率转换器等,这些器件的参数指标直接决定了量子通信系统的性能。

1. 单光子探测器
盖革模式下的单光子雪崩光电二极管具有成本低、体积小、无需超低温制冷等优势,是实用化量子通信领域的首选方案。本研究方向主要开展以下几方面的工作:
(1) 高效率、低噪声InGaAs/InP单光子雪崩光电二极管(SPAD)的设计与制备;
(2) 高性能淬灭电子学系统及其单片集成电路的设计;
(3) InGaAs/InP单光子探测器在量子通信、激光雷达等领域中的应用;
(4) 高效率硅单光子探测器的研制。

2. 量子随机数发生器
量子随机数发生器是基于量子物理原理产生真随机数的系统,具备不可预测性、不可重复性和无偏性等特征,是量子通信系统的另一项核心器件。本研究方向主要开展以下几方面的工作:
(1) 高速率量子随机数的产生;
(2) 小型化实时量子随机数发生器;
(3) 器件无关量子随机数的产生,解决了现实条件下器件不完美所引起的熵估计错误和偏置。

3. 单光子频率转换
(1) 研制高效率的周期性极化铌酸锂波导;
(2) 以及基于此波导的单光子频率转换技术及其在量子信息中的应用;
(3) 研究基于基于上转换单光子探测器光纤传感、量子激光雷达等。

相关论文

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  • Yu, C., Qiu, J., Xia, H., Dou, X., Zhang, J. & Pan, J. -W. Compact and lightweight 1.5 $\mu$ m lidar with a multi-mode fiber coupling free-running InGaAs/InP single-photon detector. Review of Scientific Instruments 89, 103106 (2018).
  • Liu, Y., Zhao, Q., Li, M. -H., Guan, J. -Y., Zhang, Y., Bai, B., Zhang, W., Liu, W. -Z., Wu, C., Yuan, X., Li, H., Munro, W., Wang, Z., You, L., Zhang, J., Ma, X., Fan, J. -Y., Zhang, Q. & Pan, J. -W. Device-independent quantum random-number generation. Nature 3, (2018).
  • Liu, Y., Yuan, X., Li, M. -H., Zhang, W., Zhao, Q., Zhong, J., Cao, Y., Li, Y. -H., Chen, L. -K., Li, H., Peng, T., Chen, Y. -A., Peng, C. -Z., Shi, S. -C., Wang, Z., You, L., Ma, X., Fan, J. -Y., Zhang, Q. & Pan, J. -W. High-Speed Device-Independent Quantum Random Number Generation without a Detection Loophole. Physical Review Letters 120, 010503 (2018).
  • Jiang, W. -H., Gao, X. -J., Fang, Y. -Q., Liu, J. -H., Zhou, Y., Jiang, L. -Q., Chen, W., Jin, G., Zhang, J. & Pan, J. -W. Miniaturized high-frequency sine wave gating InGaAs/InP single-photon detector. Review of Scientific Instruments 89, 123104 (2018).
  • Jiang, W. -H., Liu, J. -H., Liu, Y., Jin, G., Zhang, J. & Pan, J. -W. 125 GHz sine wave gating InGaAs/InP single-photon detector with a monolithically integrated readout circuit. Optics Letters 42, 5090 (2017).
  • Yu, C., Shangguan, M., Xia, H., Zhang, J., Dou, X. & Pan, J. -W. Fully integrated free-running InGaAs/InP single-photon detector for accurate lidar applications. Optics Express 25, 14611 (2017).
  • Qian, Y., Liang, F. -T., Wang, X., Li, F., Chen, L. & Jin, G. Note: A 10 Gbps real-time post-processing free physical random number generator chip. Review of Scientific Instruments 88, 096105 (2017).
  • Wu, C., Bai, B., Liu, Y., Zhang, X., Yang, M., Cao, Y., Wang, J., Zhang, S., Zhou, H., Shi, X., Ma, X., Ren, J. -G., Zhang, J., Peng, C. -Z., Fan, J. -Y., Zhang, Q. & Pan, J. -W. Random Number Generation with Cosmic Photons. Physical Review Letters 118, 140402 (2017).
  • Zhou, N., Jiang, W. -H., Chen, L. -K., Fang, Y. -Q., Da Li, Z. -, Liang, H., Chen, Y. -A., Zhang, J. & Pan, J. -W. Sine wave gating silicon single-photon detectors for multiphoton entanglement experiments. Review of Scientific Instruments 88, 083102 (2017).