Nonreciprocal transmission, reflection, and absorption in non-Hermitian cavity magnonics

Abstract

Nonreciprocal transmission, reflection and absorption are very important in quantum science. For their realization, cavity magnonics is attracting much attention, where Kittel mode describing collective excitations of a large number of spins is excited through driving magnons with a strong microwave field. The cavity photons and magnons are coupled via magnetic dipole interaction, while the magnons and phonons are coupled via magnetostrictive interaction. By applying experimental feasible parameters, we breaks the symmetry of spatial inversion in order to realize nonreciprocal transmission, reflection absorption. Our results reveal a new strategy to protect quantum resources for building noise-tolerant quantum processors, realizing chiral networks, and invisible quantum sensing.

Keywords

• Nonreciprocal
• Transmission
• Reflection
• Absorption
• The non-Hermitian system
• Cavity magnonics