Observation of Anti- P T -Symmetry Phase Transition in the Magnon-Cavity-Magnon Coupled System

As the counterpart of PT symmetry, for anti-PT-symmetry abundant phenomena and potential applications have been predicted or demonstrated theoretically. However, experimental realization of the coupling required in anti-PT symmetry is difficult. By our coupling two yttrium iron garnet spheres commonly to a microwave cavity, the large cavity dissipation rate makes the magnon-magnon coupling dissipative and purely imaginary. Thereby, the hybrid magnon-cavity system obeys a two-dimensional anti-PT Hamiltonian. In terms of the magnon-readout method, the method adopted here, we demonstrate the validity of our method in constructing an anti-PT system and present the counterintuitive level-attraction process. Our work provides a platform to explore the anti-PT-symmetry properties and paves the way to study dynamical evolution and topological properties around exceptional points in multimagnon-cavity systems.

DOI

10.1103/PhysRevApplied.13.014053

Citation

Zhao, J, Liu, Y, Wu, L, Duan, C K, Liu, Y X & Du, J 2020, ' Observation of Anti- P T -Symmetry Phase Transition in the Magnon-Cavity-Magnon Coupled System ', Physical Review Applied, vol. 13, no. 1, 014053, pp. 1-6 . https://doi.org/10.1103/PhysRevApplied.13.014053

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202002212255

Collections

[article-cris] Perustieteiden korkeakoulu / SCI

Show all metadata

Observation of Anti- P T -Symmetry Phase Transition in the Magnon-Cavity-Magnon Coupled System

Access rights

URL

Journal Title

Journal ISSN

Volume Title

Authors

Date

Department

Major/Subject

Mcode

Degree programme

Language

Pages

Series

Abstract

Description

Keywords

Other note

DOI

Citation

Permanent link to this item

Collections