利用正交直积态的量子密钥分配协议  

Quantum Key Distribution Protocol Using Orthogonal Product Quantum States

作　　者：赵秋宇[1] 张德喜[1] 李晓宇[2] 

机构地区：[1]许昌学院电气信息工程学院,河南许昌461000 [2]郑州大学信息工程学院,郑州450052

出　　处：《电子科技大学学报》2008年第3期401-403,410,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(60603002);河南省自然科学基金(0611052800)

摘　　要：基于量子密钥分配协议是目前实现密钥分配最安全的方法,两个三态量子位组成的复合系统中存在一组正交直积态,它可以表现出非定域性。该文提出了一个建立在该系统的非定域性基础上的量子密钥分配协议,协议双方通过交换量子位和集体测量建立起共享的密钥。量子力学的基本原理保证了该协议是无条件安全的,没有第三方可以窃取密钥而不被发现。该协议不需要纠缠态,也不需要做任何量子操作。因此,它更容易在实践中实现,同时具有更高的可靠性与健壮性。Quantum key distribution is the most secure technology to distribute a secret key. There is a set of orthogonal product states in a two-qubit three-state quantum system which can show nonlocality, This paper provides a quantum key distribution protocol based otn the nonlocality of such system. The two parties establish the key by exchanging quantum qubits and performing the collective measurement on them. The laws of quantum mechanics guarantee that this protocol is unconditionally secure. No other people earl get the key without being found. There are no entangled states and quantum operations needed in the protocol. So it is easier to carry out in practice. And it can gain high reliability and robustness.

关 键 词：集体测量 非定域性 正交直积态 量子密码学 量子密钥分配 

分 类 号：TN918[电子电信—通信与信息系统] TP309.7[电子电信—信息与通信工程]