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 Λ-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 Λ-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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