中国物理B ›› 2026, Vol. 35 ›› Issue (3): 30302-030302.doi: 10.1088/1674-1056/adfb57

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Critical exponents near the Liouvillian exceptional structure in Rydberg vapors

Chuanming Li(李传铭)1, Konghao Sun(孙孔浩)2,†, and Wei Yi(易为)1,3,4,5   

  1. 1 Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS), Beijing 100190, China;
    3 Anhui Province Key Laboratory of Quantum Network, University of Science and Technology of China, Hefei 230026, China;
    4 CAS Center For Excellence in Quantum Information and Quantum Physics, Hefei 230026, China;
    5 Anhui Center for Fundamental Sciences in Theoretical Physics, University of Science and Technology of China, Hefei 230026 China
  • 收稿日期:2025-06-09 修回日期:2025-07-24 接受日期:2025-08-14 出版日期:2026-02-11 发布日期:2026-03-10
  • 通讯作者: Konghao Sun E-mail:sunkh@iphy.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12374479).

Critical exponents near the Liouvillian exceptional structure in Rydberg vapors

Chuanming Li(李传铭)1, Konghao Sun(孙孔浩)2,†, and Wei Yi(易为)1,3,4,5   

  1. 1 Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS), Beijing 100190, China;
    3 Anhui Province Key Laboratory of Quantum Network, University of Science and Technology of China, Hefei 230026, China;
    4 CAS Center For Excellence in Quantum Information and Quantum Physics, Hefei 230026, China;
    5 Anhui Center for Fundamental Sciences in Theoretical Physics, University of Science and Technology of China, Hefei 230026 China
  • Received:2025-06-09 Revised:2025-07-24 Accepted:2025-08-14 Online:2026-02-11 Published:2026-03-10
  • Contact: Konghao Sun E-mail:sunkh@iphy.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12374479).

摘要: In a dissipative Rydberg vapor, the interplay of many-body effects and non-Hermiticity gives rise to a Liouvillian exceptional structure, where exceptional arcs merge at a higher-order exceptional point of the Liouvillian superoperator. Spectral features of the exceptional structure naturally give rise to critical dynamics, which have interesting implications for experiments. In this work, we study the response of the system to perturbations near the Liouvillian exceptional structure, and evaluate the critical exponents. The results are consistent with those in linear non-Hermitian Hamiltonians, thus confirming the exceptional nature of the structures herein. We also discuss how these exponents can be measured experimentally.

关键词: Rydberg vapors, open system, Liouvillian exceptional point, critical scaling

Abstract: In a dissipative Rydberg vapor, the interplay of many-body effects and non-Hermiticity gives rise to a Liouvillian exceptional structure, where exceptional arcs merge at a higher-order exceptional point of the Liouvillian superoperator. Spectral features of the exceptional structure naturally give rise to critical dynamics, which have interesting implications for experiments. In this work, we study the response of the system to perturbations near the Liouvillian exceptional structure, and evaluate the critical exponents. The results are consistent with those in linear non-Hermitian Hamiltonians, thus confirming the exceptional nature of the structures herein. We also discuss how these exponents can be measured experimentally.

Key words: Rydberg vapors, open system, Liouvillian exceptional point, critical scaling

中图分类号:  (Decoherence; open systems; quantum statistical methods)

  • 03.65.Yz
05.70.Jk (Critical point phenomena) 42.50.-p (Quantum optics) 05.30.Rt (Quantum phase transitions)