论文标题
高速综合QKD系统
High-speed integrated QKD system
论文作者
论文摘要
如今，量子密钥分布（QKD）是一种以信息理论安全方式生成距离的秘密密钥的良好方法，因为QKD的保密性依赖于量子物理定律，而不是计算复杂性。为了使QKD化，需要低成本，大规模制造和实用的QKD设置。因此，发件人和接收器各自的组件的光子和电子整合目前是聚光灯下的。在这里，我们提出了高速（2.5 GHz）集成的QKD设置，该设置具有硅光子学中的发射器芯片，允许进行高速调制和准确的状态制备，以及由女性磨砂玻璃制造的铝纤维硅化铝纤维硅芯片的独立于极化的低损坏接收器芯片。我们的系统达到了原始的位错误率，量子位错误率和秘密密钥率，等效于基于离散组件的更为复杂的最新设置。
Quantum key distribution (QKD) is nowadays a well established method for generating secret keys at a distance in an information-theoretic secure way, as the secrecy of QKD relies on the laws of quantum physics and not computational complexity. In order to industrialize QKD, low-cost, mass-manufactured and practical QKD setups are required. Hence, photonic and electronic integration of the sender's and receiver's respective components is currently in the spotlight. Here we present a high-speed (2.5 GHz) integrated QKD setup featuring a transmitter chip in silicon photonics allowing for high-speed modulation and accurate state preparation, as well as a polarization-independent low-loss receiver chip in aluminum borosilicate glass fabricated by the femtosecond laser micromachining technique. Our system achieves raw bit error rates, quantum bit error rates and secret key rates equivalent to a much more complex state-of-the-art setup based on discrete components.
