论文标题
面对高噪声的基于纠缠的量子通信的途径
Pathways for entanglement based quantum communication in the face of high noise
论文作者
论文摘要
基于纠缠的量子通信提供了实际的秘密共享密钥分布的安全性。使这一安全的基本原则之一 - 干扰一个光子将破坏纠缠并因此被检测到这一事实 - 也是最大的障碍。旅行光子，损失和技术缺陷的随机遇到使噪声成为任何量子通信方案的必然部分，严重限制距离，关键速度和可以使用QKD的环境条件。使用纠缠其空间自由度的光子，我们表明，高维纠缠的噪声耐药性的增加确实可以用于实用的关键分布方案。我们在各种环境噪声的八个纠缠路径中执行量子密钥分布，并显示关键速率，即使在误差校正和隐私放大后，每个光子对仍然超过$ 1 $ $ $ $，此外还可以在噪声水平上证明安全键，该噪声级别可以禁止基于可比较的Qubit基于工作。
Entanglement based quantum communication offers an increased level of security in practical secret shared key distribution. One of the fundamental principles enabling this security -- the fact that interfering with one photon will destroy entanglement and thus be detectable -- is also the greatest obstacle. Random encounters of traveling photons, losses and technical imperfections make noise an inevitable part of any quantum communication scheme, severely limiting distance, key rate and environmental conditions in which QKD can be employed. Using photons entangled in their spatial degree of freedom, we show that the increased noise resistance of high-dimensional entanglement, can indeed be harnessed for practical key distribution schemes. We perform quantum key distribution in eight entangled paths at various levels of environmental noise and show key rates that, even after error correction and privacy amplification, still exceed $1$ bit per photon pair and furthermore certify a secure key at noise levels that would prohibit comparable qubit based schemes from working.
