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
复制标题
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
中科院分区:
文献类型:
--
作者:
Liu, Zhihao;Chen, Hanwu;Liu, Wenjie;Xu, Juan;Wang, Dong;Li, Zhiqiang
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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