Coherent feedback control of quantum correlations in cavity magnomechanical system with magnon squeezing

TL;DR

This paper presents a scheme using coherent feedback and magnon squeezing to significantly enhance quantum correlations, including entanglement and EPR steering, in a cavity magnomechanical system, even under realistic noisy conditions.

Contribution

It introduces a novel feedback control method that boosts quantum correlations in cavity magnomechanics with magnon squeezing, addressing thermal effects and system imperfections.

Findings

Enhanced bipartite entanglement among photon, phonon, and magnon subsystems.

Observation of EPR and one-way steering under thermal noise.

Robustness of the scheme against losses and environmental noises.

Abstract

We address a scheme to enhance the quantum correlations in cavity opto-magnomechanical system by using the coherent feedback loop in the presence of magnon squeezing. The proposed coherent feedback-control allows a significant enhancement of the entanglement of three bipartite subsystems, i.e., photon-phonon, photon-magnon and phonon-magnon. We also study the Einstein-Podolsky-Rosen steering and one-way steering in the presence of thermal effects without imposing additional conditions of asymmetric losses or noises in the subsystems. Furthermore, we investigate the sensitiveness of the scheme to the magnon squeezing, and its performance in non-ideal situations in which losses and noises are taken into account.