论文标题
在空间分离的低温系统中的超导电路之间的微波量子联系
Microwave Quantum Link between Superconducting Circuits Housed in Spatially Separated Cryogenic Systems
论文作者
论文摘要
超导电路是实现量子计算系统的强大竞争者，并且也成功地用于研究量子光学和杂交量子系统。然而，它们的低温操作温度以及当前缺乏相干性的微波转换解决方案阻碍了超导量子网络跨越不同低温系统或较大距离的超导量子网络的实现。在这里，我们报告了一个紧迫性波导的成功操作，该操作连贯地连接了两个稀释冰箱中的transmon吨位，其物理距离为五米。我们在此基本网络的两个节点之间转移量子状态并以平均转移和目标状态的平均状态和目标状态产生为85.8％和79.5％的纠缠。低温微波链路确实为扩展系统的系统提供了一个机会，以在至少数十米的长度上创建局部量子通信网络。
Superconducting circuits are a strong contender for realizing quantum computing systems, and are also successfully used to study quantum optics and hybrid quantum systems. However, their cryogenic operation temperatures and the current lack of coherence-preserving microwave-to-optical conversion solutions have hindered the realization of superconducting quantum networks either spanning different cryogenics systems or larger distances. Here, we report the successful operation of a cryogenic waveguide coherently linking transmon qubits located in two dilution refrigerators separated by a physical distance of five meters. We transfer qubit states and generate entanglement on-demand with average transfer and target state fidelities of 85.8 % and 79.5 %, respectively, between the two nodes of this elementary network. Cryogenic microwave links do provide an opportunity to scale up systems for quantum computing and create local area quantum communication networks over length scales of at least tens of meters.
