中国物理B ›› 2023, Vol. 32 ›› Issue (4): 47104-047104.doi: 10.1088/1674-1056/acac17

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Demonstrate chiral spin currents with nontrivial interactions in superconducting quantum circuit

Xiang-Min Yu(喻祥敏), Xiang Deng(邓翔), Jian-Wen Xu(徐建文), Wen Zheng(郑文), Dong Lan(兰栋), Jie Zhao(赵杰), Xinsheng Tan(谭新生), Shao-Xiong Li(李邵雄), and Yang Yu(于扬)   

  1. National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2022-10-21 修回日期:2022-11-30 接受日期:2022-12-16 出版日期:2023-03-10 发布日期:2023-03-23
  • 通讯作者: Shao-Xiong Li, Yang Yu E-mail:shaoxiong.li@nju.edu.cn;yuyang@nju.edu.cn
  • 基金资助:
    Project supported by the Key R&D Program of Guangdong Province, China (Grant No. 2018B030326001), the National Natural Science Foundation of China (Grant Nos. 11474152, 12074179,U21A20436, and 61521001), and the Natural Science Foundation of Jiangsu Province, China (Grant No. BE2021015-1).

Demonstrate chiral spin currents with nontrivial interactions in superconducting quantum circuit

Xiang-Min Yu(喻祥敏), Xiang Deng(邓翔), Jian-Wen Xu(徐建文), Wen Zheng(郑文), Dong Lan(兰栋), Jie Zhao(赵杰), Xinsheng Tan(谭新生), Shao-Xiong Li(李邵雄), and Yang Yu(于扬)   

  1. National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China
  • Received:2022-10-21 Revised:2022-11-30 Accepted:2022-12-16 Online:2023-03-10 Published:2023-03-23
  • Contact: Shao-Xiong Li, Yang Yu E-mail:shaoxiong.li@nju.edu.cn;yuyang@nju.edu.cn
  • Supported by:
    Project supported by the Key R&D Program of Guangdong Province, China (Grant No. 2018B030326001), the National Natural Science Foundation of China (Grant Nos. 11474152, 12074179,U21A20436, and 61521001), and the Natural Science Foundation of Jiangsu Province, China (Grant No. BE2021015-1).

摘要: Quantum many-body systems in which time-reversal symmetry is broken give rise to a wealth of exotic phases, and thus constitute one of the frontiers of modern condensed matter physics. Quantum simulation allows us to better understand many-body systems with huge Hilbert space, where classical simulation is usually inefficient. With superconducting quantum circuit as a platform for quantum simulation, we realize synthetic Abelian gauge fields by using microwave drive and tunable coupling in loop configurations to break the time-reversal symmetry of the system. Based on high-precision manipulation and readout of circuit-QED architecture, we demonstrate the chiral ground spin current of a time-reversal symmetry broken system with nontrivial interactions. Our work is a significant attempt to simulate quantum many-body systems with time-reversal symmetry breaking in multi-qubit superconducting processors.

关键词: superconducting qubit, time-reversal symmetry breaking, chirality

Abstract: Quantum many-body systems in which time-reversal symmetry is broken give rise to a wealth of exotic phases, and thus constitute one of the frontiers of modern condensed matter physics. Quantum simulation allows us to better understand many-body systems with huge Hilbert space, where classical simulation is usually inefficient. With superconducting quantum circuit as a platform for quantum simulation, we realize synthetic Abelian gauge fields by using microwave drive and tunable coupling in loop configurations to break the time-reversal symmetry of the system. Based on high-precision manipulation and readout of circuit-QED architecture, we demonstrate the chiral ground spin current of a time-reversal symmetry broken system with nontrivial interactions. Our work is a significant attempt to simulate quantum many-body systems with time-reversal symmetry breaking in multi-qubit superconducting processors.

Key words: superconducting qubit, time-reversal symmetry breaking, chirality

中图分类号:  (Lattice fermion models (Hubbard model, etc.))

  • 71.10.Fd
42.50.Ct (Quantum description of interaction of light and matter; related experiments) 74.50.+r (Tunneling phenomena; Josephson effects)