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

TL;DR

This paper introduces a hybrid cavity magnomechanical system that enables perfect transfer and enhancement of entanglement and EPR steering between magnons, photons, and phonons, with potential applications in quantum information processing.

Contribution

It proposes a tunable, parity-time-symmetric-like cavity system for robust entanglement transfer and asymmetric steering, advancing quantum modulation techniques.

Findings

Achieved perfect transfer of entanglement and steering between modes.

Demonstrated enhancement of robust distant quantum entanglement.

Showed controllable exchange of entanglement and steering via detuning adjustments.

Abstract

We propose a hybrid cavity magnomechanical system to realize and transfer the bipartite entanglements and Einstein-Podolsky-Rosen (EPR) steerings between magnons, photons, and phonons in the regime of stability of the system. As a parity-time-symmetric-like structure exhibiting the natural magnetostrictive magnon-phonon interaction, our passive-active cavity system can be explored to 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 and steerings of different mode pairs is realized by adjusting the coupling parameters; in particular, we propose a perfect transfer scheme of steerings. These transferring processes suggest indeed an alternative method for 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 and asymmetric quantum modulation.