论文标题
将远程微波量子计算机与混合纠缠交换和变分蒸馏
Entangling remote microwave quantum computers with hybrid entanglement swap and variational distillation
论文作者
论文摘要
使用约瑟夫森连接的超导微波电路是量子计算的主要平台。为了释放其全部功能，需要进行多个微波超导电路的合作操作。因此，设计有效的协议以远程分发微波纠缠成为一个至关重要的开放问题。在这里，我们提出了一种基于光学微波纠缠的产生的连续变量纠缠 - 链路方法，与传统方法相比，在最新的参数区域可以将最终速率提高两个数量级。我们通过混合纠缠蒸馏成分进一步增强协议的能力，以在不同意 - 成功 - 成功的验证权衡方面提供巨大的优势。我们的协议可以通过近期的设备性能来实现，并且可以抵抗不完美的光损失和噪声。因此，我们的工作提供了一种实用方法，可以实现高效量子链接，用于超导微波量子计算机。
Superconducting microwave circuits with Josephson junctions are a major platform for quantum computing. To unleash their full capabilities, the cooperative operation of multiple microwave superconducting circuits is required. Therefore, designing an efficient protocol to distribute microwave entanglement remotely becomes a crucial open problem. Here, we propose a continuous-variable entanglement-swap approach based on optical-microwave entanglement generation, which can boost the ultimate rate by two orders of magnitude at state-of-the-art parameter region, compared with traditional approaches. We further empower the protocol with a hybrid variational entanglement distillation component to provide huge advantage in the infidelity-versus-success-probability trade-off. Our protocol can be realized with near-term device performance, and is robust against non-perfections such as optical loss and noise. Therefore, our work provides a practical method to realize efficient quantum links for superconducting microwave quantum computers.
