Non-reciprocal and artificial Λ-type systems in waveguide QED with parametrically modulated superconducting qubits

doi:10.1088/1674-1056/ae4f71

中国物理B ›› 2026, Vol. 35 ›› Issue (6): 64204-064204.doi: 10.1088/1674-1056/ae4f71

Non-reciprocal and artificial Λ-type systems in waveguide QED with parametrically modulated superconducting qubits

Bing-Jie Chen(陈炳杰)^1,2, Li Li(李力)^1,2, Rui-Yang Gong(龚锐洋)³, Silu Zhao(赵思路)^1,2, Shi Xiao(肖师)^1,2,4, Xiaohui Song(宋小会)^1,2,5, Zhongcheng Xiang(相忠诚)^1,2,5, and Dongning Zheng(郑东宁)^1,2,5,†

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 School of Physics, Sun Yat-sen University, Guangzhou 510275, China;
4 Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China;
5 Hefei National Laboratory, Hefei 230088, China

收稿日期:2026-01-20 修回日期:2026-02-25 接受日期:2026-03-10 出版日期:2026-05-28 发布日期:2026-06-05
通讯作者: Dongning Zheng E-mail:dzheng@iphy.ac.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12574540, 92265207, and T2121001) and Quantum Science and Technology – National Science and Technology Major Project of China (Grant No. 2021ZD0301800).

Non-reciprocal and artificial Λ-type systems in waveguide QED with parametrically modulated superconducting qubits

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 School of Physics, Sun Yat-sen University, Guangzhou 510275, China;
4 Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China;
5 Hefei National Laboratory, Hefei 230088, China

Received:2026-01-20 Revised:2026-02-25 Accepted:2026-03-10 Online:2026-05-28 Published:2026-06-05
Contact: Dongning Zheng E-mail:dzheng@iphy.ac.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12574540, 92265207, and T2121001) and Quantum Science and Technology – National Science and Technology Major Project of China (Grant No. 2021ZD0301800).

摘要/Abstract

摘要： We present a non-local quantum system based on a waveguide QED architecture, comprising two spatially separated and largely detuned superconducting transmon qubits. By applying parametric frequency modulation to one of the qubits, we establish a tunable coherent channel between the two far-detuned qubits, thereby forming an $\varLambda$-type three-level system. We demonstrate that tuning the modulation amplitude enables the observation of spectral evolution from electromagnetically induced transparency (EIT) to Autler-Townes splitting (ATS). Furthermore, by exploiting the interplay between the non-local waveguide phase and system dissipation, the system achieves significant non-reciprocal microwave transmission and direction-selective photon emission. The scheme operates without external magnetic fields, offering an efficient pathway for realizing on-chip integrated quantum routers and isolators.

关键词: waveguide QED, superconducting qubits, parametric modulation

Abstract: We present a non-local quantum system based on a waveguide QED architecture, comprising two spatially separated and largely detuned superconducting transmon qubits. By applying parametric frequency modulation to one of the qubits, we establish a tunable coherent channel between the two far-detuned qubits, thereby forming an $\varLambda$-type three-level system. We demonstrate that tuning the modulation amplitude enables the observation of spectral evolution from electromagnetically induced transparency (EIT) to Autler-Townes splitting (ATS). Furthermore, by exploiting the interplay between the non-local waveguide phase and system dissipation, the system achieves significant non-reciprocal microwave transmission and direction-selective photon emission. The scheme operates without external magnetic fields, offering an efficient pathway for realizing on-chip integrated quantum routers and isolators.

Key words: waveguide QED, superconducting qubits, parametric modulation

中图分类号: (Cavity quantum electrodynamics; micromasers)

42.50.Pq

42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption) 03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.67.Lx (Quantum computation architectures and implementations)

Bing-Jie Chen(陈炳杰), Li Li(李力), Rui-Yang Gong(龚锐洋), Silu Zhao(赵思路), Shi Xiao(肖师), Xiaohui Song(宋小会), Zhongcheng Xiang(相忠诚), and Dongning Zheng(郑东宁). Non-reciprocal and artificial Λ-type systems in waveguide QED with parametrically modulated superconducting qubits[J]. 中国物理B, 2026, 35(6): 64204-064204.

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Non-reciprocal and artificial Λ-type systems in waveguide QED with parametrically modulated superconducting qubits

Non-reciprocal and artificial Λ-type systems in waveguide QED with parametrically modulated superconducting qubits

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