Quantum networks are likely to have a profound impact on the way we compute and communicate in the future. In order to wire together superconducting quantum processors over kilometer-scale distances, we need transducers that can generate entanglement between the microwave and optical domains with high fidelity. We present an integrated electro-optic transducer that combines low-loss lithium niobate photonics with superconducting microwave resonators on a sapphire substrate. Our triply resonant device operates in a dilution refrigerator and converts microwave photons to optical photons with an on-chip efficiency of $6.6 \times {10^{- 6}}$ and a conversion bandwidth of 20 MHz. We discuss design trade-offs in this device, including strategies to manage acoustic loss, and outline ways to increase the conversion efficiency in the future.

中文翻译：

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使用三共振蓝宝石铌酸锂换能器进行低温微波到光的转换

量子网络可能会对我们未来的计算和通信方式产生深远影响。为了将超导量子处理器以千米为单位连接在一起，我们需要能够在微波和光学域之间以高保真度产生纠缠的换能器。我们提出了一种集成的电光换能器，它将低损耗的铌酸锂光子学与蓝宝石衬底上的超导微波谐振器结合在一起。我们的三重谐振装置在稀释冰箱中运行，并将微波光子转换为光子，片上效率为$ 6.6 \ times {10 ^ {-6}} $转换带宽为20 MHz。我们讨论了该设备的设计折衷方案，包括管理声损耗的策略，并概述了将来提高转换效率的方法。