Generation of time-bin entangled microwave states with quantum feedback

利用量子反馈生成时间段纠缠微波态

• 批准号: 21J12292
• 负责人: ILVES JESPER
• 金额: $ 0.77万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-28 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21J12292/
• 关键词: microwave; chiral; emitter; superconducting; qubit; directional; parametric; amplifier; quantum network; タイムビン; 量子もつれ

I have fabricated a new set of devices focused on major improvements to the circuit layout aimed on improving the coherence and directionality of the devices. In addition, I have performed extensive analytical simulations on a simplified model of the chiral emitter device to understand the factors affecting the directionality better.I have also characterized lumped-element Josephson parametric amplifier devices with a high gain, bandwidth, and dynamic range used to amplify microwave signal reflected and emitted by the chiral emitter device. The results show that the amplifiers can significantly improve the signal-to-noise ratio of the measurement with a wide bandwidth of 75 MHz for 10 dB gain and a 1 dB compression power of -105 dBm.

我制作了一套新的设备，重点是对电路布局进行重大改进，旨在提高设备的一致性和方向性。此外，我对手性发射器器件的简化模型进行了广泛的分析模拟，以更好地了解影响方向性的因素。我还对具有高增益、带宽和动态范围的集总元件约瑟夫森参量放大器器件进行了表征，用于放大手性发射器器件反射和发射的微波信号。结果表明，放大器可以在 75 MHz 的宽带宽、10 dB 增益和 -105 dBm 的 1 dB 压缩功率下显着提高测量的信噪比。

项目成果

Generation of frequency-tunable microwave photons using a fixed-frequency superconducting qubit

使用固定频率超导量子位生成频率可调微波光子

• 发表时间: 2022
• 作者: Takeaki Miyamura;Yoshiki Sunada;Jesper Ilves;Yutaka Takeda;Shu Watanabe;and Yasunobu Nakamura
• 通讯作者: and Yasunobu Nakamura

Rapid high-fidelity readout of a strongly Purcell-filtered transmon qubit

快速高保真度读取强 Purcell 过滤的 transmon 量子位

• 发表时间: 2023
• 作者: Y. Sunada;S. Tamate;P. Spring;A. Loo;J. Ilves;S. Kono;Y. Nakamura
• 通讯作者: Y. Nakamura

Fast readout and reset of a superconducting qubit coupled to a resonator with an intrinsic Purcell filter

• DOI: 10.1103/physrevapplied.17.044016
• 发表时间: 2022-02
• 作者: Y. Sunada;S. Kono;J. Ilves;S. Tamate;T. Sugiyama;Y. Tabuchi;Yasunobu Nakamura

固定周波数超伝導量子ビットを用いた周波数可変な伝搬マイクロ波光子の生成およびその成形

使用固定频率超导量子位生成和整形频率可调传播微波光子

• 发表时间: 2023
• 作者: 宮村岳昂;砂田佳希;Jesper Ilves;松浦康平;中村泰信
• 通讯作者: 中村泰信