Perfect Transfer of enhanced entanglement and asymmetric steering in a cavity magnomechanical system

We propose a hybrid cavity magnomechanical system to realize and transfer the bipartite entanglements and EPR steerings between magnons, photons and phonons in the regime of the stability of the system. Satisfying the PT -like-symmetry relevant to the passive-active-cavity structure and the proper Stokes/anti-Stokes nonlinear processes, the system can enhance the robust distant quantum entanglement and generate the relatively obvious asymmetric (even directional) EPR steering that is useful for the task with the highly asymmetric trusts of the bidirectional local measurements between two entangled states. It is of great interest that, based on such a tunable magnomechanical system, the perfect transfer between near and distant entanglements/steerings of different mode pairs is realized by adjusting the coupling parameters; especially, the transfer scheme of steerings is first proposed here. These transferring processes can suggest a novel method for the quantum information storage and manipulation. In addition, the entanglements and steerings can also be exchanged between different mode pairs by adjusting the detunings between different modes. This work may provide a potential platform for distant/asymmetric quantum modulation.Comment: 8 pages, 7 figure