Quantum state transmission over partially corrupted quantum information network
Quantum state transmission over partially corrupted quantum information network
复制标题
部分损坏的量子信息网络上的量子态传输
DOI：
10.1103/physrevresearch.2.033079
复制
发表时间：
2020
影响因子：
4.2
通讯作者：
Song Seunghoan
中科院分区：
文献类型：
--
作者：
Hayashi Masahito;Song Seunghoan
网络上的量子通信与经典的网络通信类似，特别有吸引力，但部分破坏的量子网络还没有得到充分的研究。我们讨论了在部分破坏的量子网络上的量子态传输，其中发送者传输的是比特，即-水平系统，通过网络到接收器，但是信道被破坏。作为我们的结果，我们表明，最佳的传输速率至少是在以下两个设置。在第一种情况下，中间节点上的酉是任意的，通道上的破坏是个体的。在第二种情况下，中间节点上的酉被限制为Clifford操作，并且通道上的损坏是自适应的，即，它们是由量子存储器的攻击引起的此外，我们的代码在第二种情况下实现了无噪声通信，即使与单次设置和构造依赖于网络拓扑结构和thecorrupted通道的地方。
Quantum communication over network is particularly appealing in a similar way to classical network communication, but a partially corrupted quantum network has not been sufficiently studied. We discuss quantum state transmission over a partially corrupted quantum network, in which the sender transmitsqudits, i.e.,-level systems, to the receiver via network, butchannels are corrupted. As our result, we show that the optimal transmission rate is at leastunder the following two settings. In the first case, the unitaries on intermediate nodes are arbitrary and the corruptions on thechannels are individual. In the second case, the unitaries on intermediate nodes are restricted to Clifford operations and the corruptions on thechannels are adaptive, i.e., they are caused by an attack with a quantum memory. Further, our code in the second case realizes the noiseless communication even with the single-shot setting and is constructed dependently only on the network topology and the places of thecorrupted channels.