论文标题
关于用时间门控匹配的水下量子键分配系统的优化
On the Optimization of Underwater Quantum Key Distribution Systems with Time-Gated SPADs
论文作者
论文摘要
在本文中，我们研究了各种发射器和接收器参数对水下量子键分布的量子位错误率（QBER）性能的影响。我们利用一种蒙特卡洛方法模拟从发射器向接收器传输的发射光子的轨迹。基于传播延迟结果，我们首先确定位周期的适当值，以避免由于可能的多个散射事件而导致的隔膜干扰。然后，根据接收光子的到达角度，我们确定适当的视野，以限制接收到的背景噪声的平均数量。最后，我们确定单个光子雪崩二极管（SPAD）栅极时间的最佳值，以最大程度地减少所选系统参数和给定的传播环境的QBER。
In this paper, we study the effect of various transmitter and receiver parameters on the quantum bit error rate (QBER) performance of underwater quantum key distribution. We utilize a Monte Carlo approach to simulate the trajectories of emitted photons transmitting in the water from the transmitter towards receiver. Based on propagation delay results, we first determine a proper value for bit period to avoid the intersymbol interference as a result of possible multiple scattering events. Then, based on the angle of arrival of the received photons, we determine a proper field-of-view to limit the average number of received background noise. Finally, we determine the optimal value for the single photon avalanche diode (SPAD) gate time in the sense of minimizing the QBER for the selected system parameters and given propagation environment.
