Prediction of Attractive Level Crossing via a Dissipative Mode

Yu, Weichao1,2,3; Wang, Jiongjie1,2; Yuan, H. Y.4; Xiao, Jiang1,2,5

2019-11-26

10.1103/PhysRevLett.123.227201

PHYSICAL REVIEW LETTERS   影响因子和分区

0031-9007

1079-7114

The new field of spin cavitronics focuses on the interaction between the magnon excitation of a magnetic element and the electromagnetic wave in a microwave cavity. In the strong interaction regime, such an interaction usually gives rise to the level anticrossing for the magnonic and the electromagnetic mode. Recently, the attractive level crossing has been observed, and it is explained by a non-Hermitian model Hamiltonian. However, the mechanism of such attractive coupling is still unclear. We reveal the secret by using a simple model with two harmonic oscillators coupled to a third oscillator with large dissipation. We further identify this dissipative third party as the invisible cavity mode with large leakage in cavity-magnon experiments. This understanding enables one to design dissipative coupling in all sorts of coupled systems.

SCI ; EI

英语

NI论文

其他

China Postdoctoral Science Foundation[2018M641906]

Physics

Physics, Multidisciplinary

WOS:000499987900017

AMER PHYSICAL SOC

20195007836420

Electric excitation ; Electromagnetic waves

Railway Plant and Structures, General:681.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electromagnetic Waves:711

PHYSICS

Web of Science

1.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
2.Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China
3.Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
5.Fudan Univ, Inst Nanoelect Devices & Quantum Comp, Shanghai 200433, Peoples R China

Yu, Weichao,Wang, Jiongjie,Yuan, H. Y.,et al. Prediction of Attractive Level Crossing via a Dissipative Mode[J]. PHYSICAL REVIEW LETTERS,2019,123(22).

Yu, Weichao,Wang, Jiongjie,Yuan, H. Y.,&Xiao, Jiang.(2019).Prediction of Attractive Level Crossing via a Dissipative Mode.PHYSICAL REVIEW LETTERS,123(22).

Yu, Weichao,et al."Prediction of Attractive Level Crossing via a Dissipative Mode".PHYSICAL REVIEW LETTERS 123.22(2019).