Quantum networks will enable a variety of applications, from secure communication and precision measurements to distributed quantum computing. Storing photonic qubits and controlling their frequency, bandwidth, and retrieval time are important functionalities in future optical quantum networks. Here we demonstrate these functions using an ensemble of erbium ions in yttrium orthosilicate coupled to a silicon photonic resonator and controlled via on-chip electrodes. Light in the telecommunication C-band is stored, manipulated, and retrieved using a dynamic atomic frequency comb protocol controlled by linear DC Stark shifts of the ion ensemble’s transition frequencies. We demonstrate memory time control in a digital fashion in increments of 50 ns, frequency shifting by more than a pulse width (${\pm}39\;{\rm MHz} $), and a bandwidth increase by a factor of 3, from 6 to 18 MHz. Using on-chip electrodes, electric fields as high as 3 kV/cm were achieved with a low applied bias of 5 V, making this an appealing platform for rare-earth ions, which experience Stark shifts of the order of 10 kHz/(V/cm).

中文翻译：

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量子网络在电信波长下的多功能片上存储

量子网络将支持从安全通信和精确测量到分布式量子计算的各种应用。存储光子量子位并控制其频率，带宽和检索时间是未来光量子网络的重要功能。在这里，我们使用耦合到硅光子谐振器并通过片上电极控制的原硅酸钇中的an离子集合体来演示这些功能。电信C波段的光是通过使用动态原子频率梳状协议来存储，操纵和检索的，该协议由离子整体转换频率的线性DC Stark位移控制。我们以50 ns的增量以数字方式演示了存储时间控制，其频移超过了脉冲宽度（$ {\ pm} 39 \; {\ rm MHz} $），带宽从6到18 MHz增长了3倍。使用片上电极，可在5 V的低施加偏压下获得高达3 kV / cm的电场，这使其成为稀土离子的理想平台，稀土离子经历了10 kHz /（V /厘米）。