Abstract:

Using a five-particle cluster state as the channel, three bidirectional controlled quantum information transmission protocols for two-particle state and single-particle state are proposed. In the first protocol, Alice can transfer the unknown state of two particles to Bob, and Bob can also transfer the unknown state of a single particle to Alice by introducing auxiliary particles, implementing controlled non gate operation and Bell state measurement. In the second scheme, by introducing auxiliary particles, cleverly constructing orthogonal basis and performing single-particle projective measurement, Alice can help Bob to prepare the known state of two particles remotely, and Bob can also help Alice to prepare the known state of single particle remotely. Because they make full use of the feedforward strategy to construct the measurement basis, the preparation task can be completed perfectly. In the third scheme, combined with the characteristics of the first two schemes, Alice can successfully transfer the unknown state of two particles to Bob, and Bob can perfectly prepare the known state of the single particle at Alice site. The above three schemes cannot be realized without the permission of the supervisor.

Key words: quantum communication, asymmetric bidirectional controlled teleportation, asymmetric bidirectional controlled remote state preparation, asymmetric bidirectional controlled quantum information hybrid transmission, five-particle cluster state

摘要：

利用一个五粒子团簇态为信道，分别提出了三个关于二粒子态和单粒子态的双向受控量子信息传输协议。在第一个协议中，通过引入辅助粒子，实施受控非门运算和Bell态测量，Alice能把二粒子未知态传送给Bob，同时Bob也能把单粒子未知态传送给Alice。在第二个方案中，通过引入辅助粒子、巧妙构造正交基和执行单粒子投影测量，Alice能帮助Bob远程地制备二粒子已知态，同时Bob也能帮助Alice远程地制备单粒子已知态。由于他们充分利用了前馈策略去构造测量基，制备任务能够完美完成。在第三个方案中，结合前两个方案的特点，Alice能成功将二粒子未知态传送给Bob，Bob也完美地在Alice处制备单粒子已知态。上述三个方案离开监控者的允许是不能实现的。

关键词: 量子通信, 非对称双向受控隐形传态, 非对称双向受控远程态制备, 非对称双向受控量子信息混合传输, 五粒子团簇态