Remote information transfer between cavity-magnonics nodes

Abstract This paper presents a theoretical analysis of remote information transmission based on a cavity-magnon quantum system. We first investigate the dynamics of a two-site coupled-cavity model, where each cavity contains a magnon. Under the condition of large hopping between two cavities or large detuning between the magnon and cavity modes, the state transfer between two distant magnons could be achieved without exciting the cavity field modes. Optimal coherent state transfer is also demonstrated by carefully adjusting parameters to suppress the cavity excitations. Our model could be utilized as the building block for quantum network by extending to one-dimensional coupled cavity chains.