论文标题
连续可变量子键分布的实验研究
Experimental study of continuous variable quantum key distribution
论文作者
论文摘要
在文献中已经证明，限制量子加密系统通信速率的主要技术因素通过单光子限制了与编码方法的选择主要有关。实际上，使用的来源的效率非常有限，单个光子源的最多只有百分之几的顺序，并且光子计数器不能超过一定速度，并且以低的检测效率进行操作。为了部分克服这些缺点，使用连续的量子状态作为基于量子量表的标准编码的替代方案是有利的。在这种情况下，我们提出了一种基于涡轮代码的新对帐方法。我们的理论模型假设得到了实验结果的支持。实际上，我们的方法可显着改善协议安全性，并大大减少QBER。增益是随着合理的复杂性提高而获得的。此外，我们工作的新颖性是它在Vpitransmissermaker下测试了真实光子系统的对帐方法。
It has been proven in the literature that the main technological factors limiting the communication rates of quantum cryptography systems by single photon are mainly related to the choice of the encoding method. In fact, the efficiency of the used sources is very limited, at best of the order of a few percent for the single photon sources and the photon counters can not be operated beyond a certain speed and with a low order of detection efficiency. In order to overcome partially these drawbacks, it is advantageous to use continuous quantum states as an alternative to standard encodings based on quantum qubits. In this context, we propose a new reconciliation method based on Turbo codes. Our theoretical model assumptions are supported by experimental results. Indeed, our method leads to a significant improvement of the protocol security and a large decrease of the QBER. The gain is obtained with a reasonable complexity increase. Also, the novelty of our work is that it tested the reconciliation method on a real photonic system under VPItransmissionMaker.
