We introduce a method for high-fidelity quantum state transduction between a superconducting microwave qubit and the ground state spin system of a solid-state artificial atom, mediated via an acoustic bus connected by piezoelectric transducers. Applied to present-day experimental parameters for superconducting circuit qubits and diamond silicon-vacancy centers in an optimized phononic cavity, we estimate quantum state transduction with fidelity exceeding 99% at a MHz-scale bandwidth. By combining the complementary strengths of superconducting circuit quantum computing and artificial atoms, the hybrid architecture provides high-fidelity qubit gates with long-lived quantum memory, high-fidelity measurement, large qubit number, reconfigurable qubit connectivity, and high-fidelity state and gate teleportation through optical quantum networks.

我们介绍了一种在超导微波量子位和固态人造原子的基态自旋系统之间进行高保真量子态转换的方法，通过压电换能器连接的声学总线进行介导。应用于优化声子腔中超导电路量子位和金刚石硅空位中心的当今实验参数，我们估计了在 MHz 级带宽下保真度超过 99% 的量子状态转换。通过结合超导电路量子计算和人造原子的互补优势，混合架构提供具有长寿命量子存储器、高保真测量、大量子比特数、可重构量子比特连通性以及高保真状态和门的高保真量子比特门通过光量子网络进行隐形传态。