Topological phase transition in cavity optomechanical system with periodical modulation

doi:10.1088/1674-1056/ac4a6a

中国物理B ›› 2022, Vol. 31 ›› Issue (7): 70301-070301.doi: 10.1088/1674-1056/ac4a6a

Topological phase transition in cavity optomechanical system with periodical modulation

Zhi-Xu Zhang(张志旭)¹, Lu Qi(祁鲁)², Wen-Xue Cui(崔文学)^1,†, Shou Zhang(张寿)¹, and Hong-Fu Wang(王洪福)^1,‡

1 Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
2 School of Physics, Harbin Institute of Technology, Harbin 150001, China

收稿日期:2021-11-09 修回日期:2021-12-21 接受日期:2022-01-12 出版日期:2022-06-09 发布日期:2022-06-13
通讯作者: Wen-Xue Cui, Hong-Fu Wang E-mail:cuiwenxue@ybu.edu.cn;hfwang@ybu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61822114, 12074330, and 62071412).

Topological phase transition in cavity optomechanical system with periodical modulation

Zhi-Xu Zhang(张志旭)¹, Lu Qi(祁鲁)², Wen-Xue Cui(崔文学)^1,†, Shou Zhang(张寿)¹, and Hong-Fu Wang(王洪福)^1,‡

1 Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
2 School of Physics, Harbin Institute of Technology, Harbin 150001, China

Received:2021-11-09 Revised:2021-12-21 Accepted:2022-01-12 Online:2022-06-09 Published:2022-06-13
Contact: Wen-Xue Cui, Hong-Fu Wang E-mail:cuiwenxue@ybu.edu.cn;hfwang@ybu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61822114, 12074330, and 62071412).

摘要/Abstract

摘要： We investigate the topological phase transition and the enhanced topological effect in a cavity optomechanical system with periodical modulation. By calculating the steady-state equations of the system, the steady-state conditions of cavity fields and the restricted conditions of effective optomechanical couplings are demonstrated. It is found that the cavity optomechanical system can be modulated to different topological Su-Schrieffer-Heeger (SSH) phases via designing the optomechanical couplings legitimately. Meanwhile, combining the effective optomechanical couplings and the probability distributions of gap states, we reveal the topological phase transition between trivial SSH phase and nontrivial SSH phase via adjusting the decay rates of cavity fields. Moreover, we find that the enhanced topological effect of gap states can be achieved by enlarging the size of system and adjusting the decay rates of cavity fields.

关键词: topological phase transition, periodical modulation, enhanced topological effect

Abstract: We investigate the topological phase transition and the enhanced topological effect in a cavity optomechanical system with periodical modulation. By calculating the steady-state equations of the system, the steady-state conditions of cavity fields and the restricted conditions of effective optomechanical couplings are demonstrated. It is found that the cavity optomechanical system can be modulated to different topological Su-Schrieffer-Heeger (SSH) phases via designing the optomechanical couplings legitimately. Meanwhile, combining the effective optomechanical couplings and the probability distributions of gap states, we reveal the topological phase transition between trivial SSH phase and nontrivial SSH phase via adjusting the decay rates of cavity fields. Moreover, we find that the enhanced topological effect of gap states can be achieved by enlarging the size of system and adjusting the decay rates of cavity fields.

Key words: topological phase transition, periodical modulation, enhanced topological effect

中图分类号: (Phases: geometric; dynamic or topological)

03.65.Vf

73.43.Nq (Quantum phase transitions)

Zhi-Xu Zhang(张志旭), Lu Qi(祁鲁), Wen-Xue Cui(崔文学), Shou Zhang(张寿), and Hong-Fu Wang(王洪福). Topological phase transition in cavity optomechanical system with periodical modulation[J]. 中国物理B, 2022, 31(7): 70301-070301.

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Topological phase transition in cavity optomechanical system with periodical modulation

Topological phase transition in cavity optomechanical system with periodical modulation

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