中国物理B ›› 2025, Vol. 34 ›› Issue (3): 30305-030305.doi: 10.1088/1674-1056/adab64

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Periodic modulation of adiabatic dynamics in non-reciprocal Landau-Zener systems

Rong Chang(常蓉) and Sheng-Chang Li(栗生长)†   

  1. MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, and School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
  • 收稿日期:2024-11-04 修回日期:2024-12-16 接受日期:2025-01-17 发布日期:2025-03-15
  • 通讯作者: Sheng-Chang Li E-mail:scli@xjtu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12375019 and 11974273).

Periodic modulation of adiabatic dynamics in non-reciprocal Landau-Zener systems

Rong Chang(常蓉) and Sheng-Chang Li(栗生长)†   

  1. MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, and School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2024-11-04 Revised:2024-12-16 Accepted:2025-01-17 Published:2025-03-15
  • Contact: Sheng-Chang Li E-mail:scli@xjtu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12375019 and 11974273).

摘要: The control of adiabatic dynamics is essential for quantum manipulation. We investigate the effects of both periodic modulating field and linear sweeping field on adiabatic dynamics based on a non-reciprocal Landau-Zener model with periodic modulation. We obtain adiabatic phase diagrams in the $(\omega,\delta)$ parameter space, where the adiabatic region is bounded by the modulating frequency $\omega$ greater than a critical value $\omega_{\rm c}$ and the non-reciprocal parameter $\delta$ less than one. The results show that the adiabaticity of the system is not sensitive to the modulating amplitude. We find that the critical modulating frequency can be expressed as a power function of the modulating period number or the sweeping rate. Our findings suggest that one can change the adiabatic region or improve the adiabaticity by adjusting the parameters of both the modulating and the sweeping fields, which provides an effective means to flexibly control the adiabatic dynamics of non-reciprocal systems.

关键词: adiabaticity, non-reciprocity, Landau-Zener tunneling, periodic modulation

Abstract: The control of adiabatic dynamics is essential for quantum manipulation. We investigate the effects of both periodic modulating field and linear sweeping field on adiabatic dynamics based on a non-reciprocal Landau-Zener model with periodic modulation. We obtain adiabatic phase diagrams in the $(\omega,\delta)$ parameter space, where the adiabatic region is bounded by the modulating frequency $\omega$ greater than a critical value $\omega_{\rm c}$ and the non-reciprocal parameter $\delta$ less than one. The results show that the adiabaticity of the system is not sensitive to the modulating amplitude. We find that the critical modulating frequency can be expressed as a power function of the modulating period number or the sweeping rate. Our findings suggest that one can change the adiabatic region or improve the adiabaticity by adjusting the parameters of both the modulating and the sweeping fields, which provides an effective means to flexibly control the adiabatic dynamics of non-reciprocal systems.

Key words: adiabaticity, non-reciprocity, Landau-Zener tunneling, periodic modulation

中图分类号:  (Quantum mechanics)

  • 03.65.-w
03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations) 74.50.+r (Tunneling phenomena; Josephson effects)