Deterministic secure direct communication using GHZ states and swapping quantum entanglement
Deterministic secure direct communication using GHZ states and swapping quantum entanglement
复制标题
使用 GHZ 状态和交换量子纠缠的确定性安全直接通信
DOI：
10.1088/0305-4470/38/25/011
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发表时间：
2005-06-24
期刊：
影响因子：
--
通讯作者：
Wang, ZX
中科院分区：
文献类型：
--
作者：
Gao, T;Yan, FL;Wang, ZX
我们提出了一个确定性的安全直接通信方案，通过纠缠交换，其中一组有序的最大纠缠三粒子态（GHZ态），最初由空间上分离的三方，爱丽丝，鲍勃和查理共享，作为量子信息信道。在保证量子信道安全的前提下，Alice和Bob根据三方约定和各自要发送给Charlie的秘密信息，对各自的粒子进行一系列的局域操作。通过Alice、Bob和Charlie的三次Bell测量结果，Charlie能够直接推断出秘密信息。秘密消息通过最初共享的GHZ状态对从Alice和Bob忠实地传输到Charlie，而不会向潜在的窃听者透露任何信息。由于任意两个量子比特之间在公共信道中不存在携带秘密信息的量子比特的传输，因此如果使用完美量子信道，则直接秘密通信是完全安全的。
We present a deterministic secure direct communication scheme via entanglement swapping, where a set of ordered maximally entangled three-particle states (GHZ states), initially shared by three spatially separated parties, Alice, Bob and Charlie, functions as a quantum information channel. After ensuring the safety of the quantum channel, Alice and Bob apply a series local operations on their respective particles according to the tripartite stipulation and the secret message they both want to send to Charlie. By three Alice, Bob and Charlie's Bell measurement results, Charlie is able to infer the secret messages directly. The secret messages are faithfully transmitted from Alice and Bob to Charlie via initially shared pairs of GHZ states without revealing any information to a potential eavesdropper. Since there is not a transmission of the qubits carrying the secret message between any two of them in the public channel, it is completely secure for direct secret communication if perfect quantum channel is used.