Quantum secure direct communication with optimal quantum superdense coding by using general four-qubit states

Quantum secure direct communication with optimal quantum superdense coding by using general four-qubit states
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使用通用四量子位状态通过最佳量子超密编码进行量子安全直接通信

DOI:
10.1007/s11128-012-0404-9
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发表时间:
2012-04
影响因子:
2.5
通讯作者:
Li, Zhiqiang
Li, Zhiqiang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Liu, Zhihao;Chen, Hanwu;Liu, Wenjie;Xu, Juan;Wang, Dong;Li, Zhiqiang

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从量子电路的角度,分别勾画了一类一般四量子位态的构造框架和测量框架。利用这种状态的特性,提出了一种量子安全直接通信(QSDC)协议,该协议采用最优量子超密编码的思想,以达到最大的效率和高的资源容量。详细讨论了该协议的安全性,并从理论上证明了该协议的安全性。并给出了量子安全直接通信中多部态适合最优量子超密编码的充要条件。
From the perspective of quantum circuit, a construction framework and a measurement framework of a general kind of four-qubit states are sketched, respectively. By utilizing the properties of this kind of states, a quantum secure direct communication (QSDC) protocol is put forward, which adopts the idea of optimal quantum superdense coding to achieve a maximal efficiency and high resources capacity. The security of the proposed protocol is discussed in detail and it is proved to be secure theoretically. Moreover, the sufficient and necessary condition of which multipartite states are suitable for optimal quantum superdense coding in quantum secure direct communication is figured out.
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