标题： 连续波和脉冲激光EQKD系统的比较 显示英文标题

标题： Comparison between continuous wave and pulsed laser EQKD systems

摘要： 量子物理和计算复杂性的进展威胁着当今密码系统的安全性，并推动了量子密钥分发(QKD)的发展。 纠缠量子密钥分发(EQKD)是一种基于基本量子力学的安全协议，不受这些威胁的影响。 QKD系统的首要衡量标准是生成秘密位的能力。 然而，到目前为止，用于模拟EQKD系统秘密位生成的方法受到技术限制，这些技术无法对光源产生的量子态提供完整的描述。 在本文中，我们提供了连续波和脉冲激光EQKD系统的秘密位率的完整描述和比较。 特别是，我们强调影响EQKD秘密位率的相关泊松和热光子统计，并使用实际系统参数和配置来展示每种情况下预期最佳性能的区域。 显示英文摘要

摘要： Advances in quantum physics and computational complexity threaten the security of present day cryptographic systems and have driven the development of quantum key distribution (QKD). Entangled quantum key distribution (EQKD) is a secure protocol that is based on fundamental quantum mechanics and is not vulnerable to these threats. The primary figure of merit for QKD systems is ability to generate secret bits. However, to date, methods that have been developed to simulate the secret bit rate generation for EQKD systems have been limited by techniques that do not provide a complete description of the quantum state produced by the source. In this paper, we provide a complete description and comparison of the secret bit rate for continuous-wave and pulsed laser EQKD systems. In particular, we highlight the relevant Poissonian and thermal photon statistics that affect the EQKD secret bit rate and use practical system parameters and configurations to show regimes where one expects optimal performance for each case.