Cavity-mediated level attraction and repulsion between magnons

We characterize some of the distinctive hallmarks magnon-magnon interaction mediated by intracavity field a microwave cavity, along with their testable ramifications. In general, we foreground two widely dissimilar parameter domains that bring forth contrasting possibilities level splitting and crossing. The former is observed in regime strong magnon-photon couplings, particularly when three modes bear comparable relaxation rates. This character marked appearance distinguishable nonconverging polariton branches spectral response to cavity drive. However, bare are resonant couplings perfectly symmetrical, one peaks gets wiped out. anomalous extinction polaritonic can be traced down existence conspicuous dark mode alongside frequency-shifted bright modes. an alternate regime, where magnon weakly coupled features attraction unfold, subject large rate for mode. Concurrently, antisymmetric detunings modes, transmission window springs into existence, exhibiting transparency limit negligible dissipation from magnons. emergence reconciled theoretical model embodies dynamics subsystem decays rapidly its steady state. this limit, identify purely dissipative coupling between