We propose an efficient microwave-photonic modulator as a resource for stationary entangled microwave-optical fields and develop the theory for deterministic entanglement generation and quantum state transfer in multi-resonant electro-optic systems. The device is based on a single crystal whispering gallery mode resonator integrated into a 3D-microwave cavity. The specific design relies on a new combination of thin-film technology and conventional machining that is optimized for the lowest dissipation rates in the microwave, optical, and mechanical domains. We extract important device properties from finite-element simulations and predict continuous variable entanglement generation rates on the order of a Mebit/s for optical pump powers of only a few tens of microwatts. We compare the quantum state transfer fidelities of coherent, squeezed, and non-Gaussian cat states for both teleportation and direct conversion protocols under realistic conditions. Combining the unique capabilities of circuit quantum electrodynamics with the resilience of fiber optic communication could facilitate long-distance solid-state qubit networks, new methods for quantum signal synthesis, quantum key distribution, and quantum enhanced detection, as well as more power-efficient classical sensing and modulation.

我们提出了一种有效的微波光子调制器作为固定纠缠微波光场的资源，并发展了在多谐振电光系统中确定性纠缠产生和量子态转移的理论。该设备基于集成到3D微波腔中的单晶回音壁模式谐振器。具体设计依赖于薄膜技术和常规加工的新组合，该组合针对微波，光学和机械领域中的最低耗散率进行了优化。我们从有限元模拟中提取重要的器件特性，并预测仅数十微瓦的光泵功率的连续可变纠缠产生速率约为Mebit / s。我们比较了相干，压缩，以及在现实条件下用于隐形传态和直接转换协议的非高斯猫态。将电路量子电动力学的独特功能与光纤通信的弹性相结合，可以促进长距离固态qubit网络，用于量子信号合成，量子密钥分配和量子增强检测的新方法，以及更节能的经典方法感应和调制。