基于QDP的蝶形量子网络编码方案

Scheme of butterfly quantum network coding based on QDP

当前已有的蝶形量子网络方案多数只能完成量子态经公共信道进行交叉传输,并且为实现蝶形网络的量子态无损传输,通常需要消耗纠缠资源。结合量子直接传态方案中态传输的方法,提出一种在蝶形网络中传输任意已知单量子态的网络编码方案。利用处于基态的单粒子作为量子寄存器,实现每个接收节点均能同时接收到来自全部发送节点发送的不同量子态。整个通信过程不需要使用纠缠资源和测量操作,仅通过各节点执行相关酉操作即可完成通信。并且将该方案扩展至采用多种形式的量子态作为寄存器以及发送节点和接收节点个数更多的情况。

Most of the existing schemes about butterfly quantum network can only realize the cross-transmission of quantum states through a public channel. And they often consume entangled resources in order to realize the non-destructive transmission of quantum states in a butterfly network. This paper proposed a quantum network coding scheme for transmitting arbitrary known single quantum state in a butterfly network. It combined the transmission process of quantum states in the quantum direct portation scheme. This scheme used single particles in the ground state as the quantum registers. Each receiving node could receive different quantum states from all sending nodes at the same time. The entire communication process did not require the use of entanglement resources and measurement operations. It could complete the communication through the relevant unitary operations performed by each node. The scheme extends to two other situation. One is that the quantum register has a richer form, and another is that the number of sending and receiving nodes is more.