Quantum correlations for quantum key distribution protocols

被引：0

作者：

Curty, M ^{[1
]}

Gühnet, O ^{[1
]}

Lewenstein, M ^{[1
]}

Lütkenhaus, N ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Theoret Phys 1, Quantum Informat Theory Grp, D-91058 Erlangen, Germany

来源：

QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING | 2004年 / 734卷

关键词：

D O I：

暂无

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

A necessary precondition for secure quantum key distribution (QKD) is that sender and receiver can prove the presence of entanglement in a quantum state that is effectively distributed between them. In order to deliver this entanglement proof one can use the class of entanglement witness operators that can be constructed from the available measurements results. This criterion provides a necessary and sufficient condition for the existence of quantum correlations even when a quantum state cannot be completely reconstructed. We apply such analysis to three well-known qubit-based QKD protocols, namely the 6-state, the 4-state and the 2-state protocols.

引用

页码：307 / 310

页数：4

共 11 条

[1]

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[2] QUANTUM CRYPTOGRAPHY USING ANY 2 NONORTHOGONAL STATES [J].