论文标题
跨量子网络代码传送的演示
Demonstration of teleportation across a quantum network code
论文作者
论文摘要
在量子网络中，一个重要的目标是减少量子信息运输和通信的资源要求。量子网络编码通过将通常表现出争议的网络分配纠缠的状态来实现一种方法。在这项工作中，我们研究了基于测量的量子网络编码（MQNC），该协议是一种适用于嘈杂的中间尺度量子设备的协议。特别是，我们开发了将MQNC适应最先进的超导处理器的技术，并随后证明了量子信息的成功传送，在先前的研究无法产生有用的纠缠程度后，在此背景下对MQNC进行了新的了解。我们的演示中的传送显示出比通过经典手段获得的忠诚度更高，这是通过考虑Bloch球体极帽的量子而成为可能的。我们还提出了MQNC的概括，并简单地映射到重-Hex处理器布局上，并将直接映射到所提出的逻辑错误校正布局上。我们的工作提供了一些有用的技术来测试并成功地执行量子网络编码。
In quantum networks an important goal is to reduce resource requirements for the transport and communication of quantum information. Quantum network coding presents a way of doing this by distributing entangled states over a network that would ordinarily exhibit contention. In this work, we study measurement-based quantum network coding (MQNC), which is a protocol particularly suitable for noisy intermediate-scale quantum devices. In particular, we develop techniques to adapt MQNC to state-of-the-art superconducting processors and subsequently demonstrate successful teleportation of quantum information, giving new insight into MQNC in this context after a previous study was not able to produce a useful degree of entanglement. The teleportation in our demonstration is shown to occur with fidelity higher than could be achieved via classical means, made possible by considering qubits from a polar cap of the Bloch Sphere. We also present a generalization of MQNC with a simple mapping onto the heavy-hex processor layout and a direct mapping onto a proposed logical error-corrected layout. Our work provides some useful techniques for testing and successfully carrying out quantum network coding.
