Quantum entanglement between two antiferromagnets in the microcavities

Abstract Magnons are being currently developed as qubits for quantum storage and information processing. Here, in this work, we focus on a hybrid quantum system containing two antiferromagnets, and entanglement between magnons in the antiferromagnets can be generated through strong coupling mediated by the same microwave mode. Moreover, we numerically simulate the process with feasible parameters. The influence of the system parameters, such as the magnon-photon coupling rate, detuning, bias magnetic field and dissipation of entanglement, are discussed. By adjusting some of the experimental parameters, we show that two antiferromagnets can produce a large entanglement, which is a result that has not been previously found in other quantum systems. Our findings may provide a potential platform for the completion of related quantum tasks in the future.