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arXiv 2008.10795quant-ph
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用于量子网络的电信波长多功能片上存储

Multifunctional on-chip storage at telecommunication wavelength for quantum networks

Ioana Craiciu, Mi Lei, Jake Rochman, John G. Bartholomew, Andrei Faraon

摘要:

量子网络将使各种应用成为可能,从安全通信和精确测量到分布式量子计算。存储光子量子比特并控制其频率、带宽和恢复时间是未来光量子网络的重要功能。在这里,我们证明了这些功能使用的铒离子在硅酸钇的合奏耦合到硅光子谐振器,并通过片上电极控制。在电信C波段的光存储,操纵和检索使用动态原子频率梳协议控制的离子系综的跃迁频率的线性DC斯塔克位移。我们演示了存储器时间控制在一个数字的方式在50纳秒的增量,频率偏移超过一个脉冲宽度($\pm39$ MHz),和带宽增加了三个因素,从6 MHz到18 MHz。使用片上电极,在5 V的低施加偏压下实现高达3 kV/cm的电场,使其成为稀土离子的吸引人的平台,其经历10 kHz/(V/cm)量级的斯塔克位移。

英文摘要:

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 ($\pm39$ MHz), and a bandwidth increase by a factor of three, from 6 MHz 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).

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