Cat-state encoding of a quantum information processor module with cavity–magnon system

Abstract

We propose a scheme to realize the strong coupling between two distant magnons by using coupled cavities as a data bus. This coupling strength can be adjusted by the parameters of the system. One magnon is considered as an information processor, while the other one acts as an information memorizer. This hybrid system is applied to construct a quantum information processor module. Based on the continuous-variable encoding (cat-state encoding) of logical qubits, the information can be transferred from the processor to the memorizer via one step of the operation. This model provides a promising hardware platform for robust quantum information processing.