中国物理B ›› 2025, Vol. 34 ›› Issue (3): 30302-030302.doi: 10.1088/1674-1056/ada550

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Coherence-protected operations in hybrid superconducting circuit-magnon system

Le-Tian Zhu(朱乐天)1, Xing-Yu Zhu(朱行宇)1,2, Zhu-Cheng Yue(岳祝诚)1, Tao Tu(涂涛)1,3,†, and Chuan-Feng Li(李传锋)1,3,‡   

  1. 1 Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China;
    2 School of Mechanical and Electronic Engineering, Suzhou University, Suzhou 234000, China;
    3 Hefei National Laboratory, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230088, China
  • 收稿日期:2024-11-14 修回日期:2024-12-21 接受日期:2025-01-03 发布日期:2025-03-15
  • 通讯作者: Tao Tu, Chuan-Feng Li E-mail:tutao@ustc.edu.cn;licf@ustc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12304401 and 11974336) and the National Key Research and Development Program of China (Grant No. 2017YFA0304100).

Coherence-protected operations in hybrid superconducting circuit-magnon system

Le-Tian Zhu(朱乐天)1, Xing-Yu Zhu(朱行宇)1,2, Zhu-Cheng Yue(岳祝诚)1, Tao Tu(涂涛)1,3,†, and Chuan-Feng Li(李传锋)1,3,‡   

  1. 1 Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China;
    2 School of Mechanical and Electronic Engineering, Suzhou University, Suzhou 234000, China;
    3 Hefei National Laboratory, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230088, China
  • Received:2024-11-14 Revised:2024-12-21 Accepted:2025-01-03 Published:2025-03-15
  • Contact: Tao Tu, Chuan-Feng Li E-mail:tutao@ustc.edu.cn;licf@ustc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12304401 and 11974336) and the National Key Research and Development Program of China (Grant No. 2017YFA0304100).

摘要: Hybrid systems consisting of superconducting circuits and magnon systems are a promising platform for quantum technology. However, realizing high-fidelity magnon state preparation and manipulation remains an outstanding challenge due to the complexity of interactions and noise sources in hybrid systems. Here, we propose a coherence-preserving magnon state manipulation scheme. By engineering a superconducting-magnon coupling pulse and combining it with dynamical decoupling pulses, we design a composite pulse sequence. We demonstrate the manipulation and preparation of non-classical states of magnons with a fidelity of up to 98% under realistic conditions. These designs significantly improve the fidelity of manipulation and robustness to noise in hybrid systems compared to existing schemes. These results pave the way for practical applications of quantum magnonics platforms.

关键词: circuit QED, quantum information with hybrid systems, entanglement production

Abstract: Hybrid systems consisting of superconducting circuits and magnon systems are a promising platform for quantum technology. However, realizing high-fidelity magnon state preparation and manipulation remains an outstanding challenge due to the complexity of interactions and noise sources in hybrid systems. Here, we propose a coherence-preserving magnon state manipulation scheme. By engineering a superconducting-magnon coupling pulse and combining it with dynamical decoupling pulses, we design a composite pulse sequence. We demonstrate the manipulation and preparation of non-classical states of magnons with a fidelity of up to 98% under realistic conditions. These designs significantly improve the fidelity of manipulation and robustness to noise in hybrid systems compared to existing schemes. These results pave the way for practical applications of quantum magnonics platforms.

Key words: circuit QED, quantum information with hybrid systems, entanglement production

中图分类号:  (Quantum computation architectures and implementations)

  • 03.67.Lx
42.50.Dv (Quantum state engineering and measurements) 42.50.Pq (Cavity quantum electrodynamics; micromasers)