Realization of Fast All-Microwave Controlled-Z Gates with a Tunable Coupler

李少炜; 范道金; 龚明; 叶杨森; 陈厦微; 吴玉林; 关卉杰; 邓辉; 荣皓; 黄合良; 查辰; 严凯; 郭少俊; 钱浩然; 张海斌; 陈福升; 朱庆玲; 赵有为; 王石宇; 应翀; 曹思睿; 余家乐; 梁福田; 徐昱; 林金; 郭成; 孙丽华; 李娜; 韩廉琛; 彭承志; 朱晓波; 潘建伟

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Realization of Fast All-Microwave Controlled-Z Gates with a Tunable Coupler

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The development of high-fidelity two-qubit quantum gates is essential for digital quantum computing.Here,we propose and realize an all-microwave parametric controlled-Z(CZ)gates by coupling strength modulation in a superconducting Transmon qubit system with tunable couplers.After optimizing the design of the tunable coupler together with the control pulse numerically,we experimentally realized a 100 ns CZ gate with high fidelity of 99.38%±0.34%and the control error being 0.1%.We note that our CZ gates are not affected by pulse distortion and do not need pulse correction,providing a solution for the real-time pulse generation in a dynamic quantum feedback circuit.With the expectation of utilizing our all-microwave control scheme to reduce the number of control lines through frequency multiplexing in the future,our scheme draws a blueprint for the high-integrable quantum hardware design.

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《中国物理快报：英文版》 |2022年第3期|6-11|共6页
作者
李少炜; 范道金; 龚明; 叶杨森; 陈厦微; 吴玉林; 关卉杰; 邓辉; 荣皓; 黄合良; 查辰; 严凯; 郭少俊; 钱浩然; 张海斌; 陈福升; 朱庆玲; 赵有为; 王石宇; 应翀; 曹思睿; 余家乐; 梁福田; 徐昱; 林金; 郭成; 孙丽华; 李娜; 韩廉琛; 彭承志; 朱晓波; 潘建伟;
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作者单位

Department of Modern Physics;

University of Science and Technology of China;

Hefei 230026;

China;

Shanghai Branch;

CAS Center for Excellence in Quantum Information and Quantum Physics;

University of Science and Technology of China;

Shanghai 201315;

China;

Shanghai Research Center for Quantum Sciences;

Shanghai 201315;

China;

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原文格式 PDF
正文语种 chi
中图分类耦合器、定向耦合器;
关键词
quantum; microwave; scheme;

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Realization of Fast All-Microwave Controlled-Z Gates with a Tunable Coupler

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