Two-Step Efficient Deterministic Secure Quantum Communication Using Three-Qubit W State
Two-Step Efficient Deterministic Secure Quantum Communication Using Three-Qubit W State
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DOI：
10.1088/0253-6102/55/6/08
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发表时间：
2011-06
影响因子：
3.1
通讯作者：
Haonan Yuan;Jun Zhou;Jun Zhou;Gang Zhang;Xiang-fei Wei;Xiangyuan Liu
中科院分区：
文献类型：
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作者：
Haonan Yuan;Jun Zhou;Jun Zhou;Gang Zhang;Xiang-fei Wei;Xiangyuan Liu
提出了一种基于三量子比特W态分组的两步确定性安全量子通信方案。在该方案中，秘密消息可以通过四个两粒子么正运算进行编码，并利用相应的贝尔基或单粒子基的测量值直接进行解码。与以往的大多数DSQC协议相比，本方案具有较高的总效率，可达50%。除此之外，它仍然具有高容量的优点，因为每个W态可以携带两个比特的秘密信息，并且由于几乎所有的实例都是有用的，所以它具有很高的固有效率。此外，采用诱饵粒子检测技术和两步传输思想保证了通信的安全性。
A two-step deterministic secure quantum communication (DSQC) scheme using blocks of three-qubit W state is proposed. In this scheme, the secret messages can be encoded by employing four two-particle unitary operations and directly decoded by utilizing the corresponding measurements in Bell basis or single-particle basis. Comparing with most previous DSQC protocols, the present scheme has a high total efficiency, which comes up to 50%. Apart from this, it has still the advantages of high capacity as each W state can carry two bits of secret information, and high intrinsic efficiency because almost all the instances are useful. Furthermore, the security of this communication can be ensured by the decoy particle checking technique and the two-step transmitting idea.