Faithful quantum secure direct communication protocol against collective noise

被引：19

作者：

Yang Jing ^{[1
]}

Wang Chuan ^{[1
,2
,3
]}

Zhang Ru ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China

[2] Tsinghua Univ, Key Lab Atom & Mol Nanosci, Beijing 100084, Peoples R China

[3] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

CHINESE PHYSICS B | 2010年 / 19卷 / 11期

基金：

中国国家自然科学基金;

关键词：

quantum secure direct communication; collective noise; CRYPTOGRAPHY; TELEPORTATION;

D O I：

10.1088/1674-1056/19/11/110306

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An improved quantum secure direct communication (QSDC) protocol is proposed in this paper Blocks of entangled photon pairs are transmitted in two steps in which secret messages are transmitted directly The single logical qubits and unitary operations under decoherence free subspaces are presented and the generalized Bell states are constructed which are immune to the collective noise Two steps of qubit transmission are used in this protocol to guarantee the security of communication The security of the protocol against various attacks are discussed

引用

页数：6

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