Chiral coupling of magnons in waveguides

Abstract

Dissipative coupling can generate non-Hermitian states of matter with interesting characteristics as, for instance, subradiant states with long lifetimes and novel topological phases. Here, the authors show that magnons and photons can interact in a chiral fashion, whereby distant magnets are dissipatively and nonreciprocally coupled in waveguides of long range. Theyformulate the basic theory of chiral magnon coupling of one to many magnets via waveguide photons and emphasize the emerging physics, involvingunidirectional pumping and superradiant edge states in chains of magnets that support large magnon accumulations.

Topics & Concepts