Abstract
We present a scheme to generate the ideal nonreciprocal tripartite entanglement in a cavity magnonic system where a yttrium iron garnet sphere is placed in a spinning microwave resonator. Based on Kerr nonlinearities of magnons, the photon, the Kittel and the higher-order magnetostatic modes are entangled with each other and the genuine tripartite entanglement also could be achieved. By spinning the resonator, the Sagnac effect directly leads to the nonreciprocity of tripartite entanglement, where the entanglement is present in one chosen propagating direction but disappears in another. Our work could be applied in constructing chiral quantum networks.
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