Perfect Transfer of Entanglement and One-Way Quantum Steering via Parametric Frequency Converter in a Two-mode Cavity Magnomechanical System

TL;DR

This paper demonstrates how a parametric frequency converter in a two-mode cavity magnomechanical system can enhance, transfer, and control quantum entanglement and one-way steering, offering new methods for quantum information processing.

Contribution

It introduces a novel scheme utilizing a parametric frequency converter to achieve perfect transfer of entanglement and one-way quantum steering in a cavity magnomechanical system.

Findings

Enhanced bipartite entanglement and asymmetrical quantum steering depend on parametric coupling and phase.

Entanglement is more robust against thermal effects with the parametric converter.

Perfect transfer of entanglement and steering is achieved by tuning system parameters.

Abstract

We study the effects of a parametric frequency converter in a two-mode cavity system where one of the cavity mode is coupled with yttrium iron garnet (YIG) via magnetic dipole interaction. Parametric frequency converter acts as a nonlinear source for enhanced entanglement among all bipartitions and asymmetrical quantum steering. The behavior of the two types of quantum correlations are shown to be dependent on parametric coupling and the associated phase factor. We show that cavity-cavity entanglement and cavity-phonon entanglement (cavity-magnon entanglement) decreases (increases) with the increase of the parametric phase factor {\phi}. In addition, generated entanglements in the present system have shown to be more robust against the thermal effects, with the inclusion of the parametric converter as compared with the bare cavity case. Another intriguing finding is the asymmetric one-way steering, where we notice that magnon and phonon modes can steer the indirectly coupled cavity modes, yet the steering in swapped direction is not observed. It is of great interest that the perfect transfer of entanglement and quantum steering is achieved among different modes by adjusting the system's parameters. In fact, our protocol for these transferring processes suggests a different approach to the processing and storage of quantum information.