n->1 Quantum random access codes using single 3-level systems
n->1 Quantum random access codes using single 3-level systems
复制标题
使用单个三层系统的 n->1 量子随机接入码
DOI：
10.1007/s11128-021-03319-2
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发表时间：
2021
影响因子：
2.5
通讯作者：
Qingle Wang
中科院分区：
文献类型：
--
作者：
Yuqian Zhou;Yaqi Dong;Qiankun Yao;Zhiyi Zhang;Dan Li;Qingle Wang
量子随机接入码（qrac）由于其不同于随机接入码的特性而备受关注。如何探索和验证最优QRAC策略是量子密码学中的一个重要研究课题。在本文中，我们关注于使用单个3级系统的最优qrac。本文利用广义Bloch球表示给出了QRAC的最大猜测概率的一般上界，最大猜测概率是检验是否为最优QRAC的重要指标。此外，通过分析方法获得了最优的qrac。最后，得到了两种qrac的最大猜测概率的紧上界。这些结果将改进基于qrac的量子密码协议，如量子密钥分发、量子随机数生成。
Quantum random access codes (QRACs) have attracted much attention because of their different properties from random access codes. How to explore and verify optimal QRAC strategies is an important research topic in quantum cryptography. In this paper, we focus on optimalQRACs using single 3-level systems. Here, we present a general upper bound of maximum guess probability ofQRACs using a generalized Bloch sphere representation, and the maximum guess probability is an important indicator to verify whether it is the optimal QRAC. Furthermore, the optimalandQRACs are obtained through analytical methods. Finally, tight upper bounds of the maximum guess probability ofandQRACs are acquired. These results will improve QRAC-based quantum cryptography protocols, such as quantum key distributions, quantum random number generations.