Emergence and enhancement of feedback control induced quantum entanglement

TL;DR

This paper proposes a feedback control scheme in a hybrid cavity magnomechanical system to enhance and stabilize quantum entanglement among mechanical oscillators and magnons, even at higher temperatures.

Contribution

It introduces a novel feedback control method that enhances and sustains quantum correlations in a hybrid cavity system, improving robustness against thermal effects.

Findings

Feedback control enhances bipartite and tripartite entanglement.

Entanglement remains robust at higher ambient temperatures.

The scheme improves quantum correlation control in hybrid systems.

Abstract

We present a scheme for controlling quantum correlations by applying feedback to the cavity mode that exits a cavity while interacting with a mechanical oscillator and magnons. In a hybrid cavity magnomechanical system with a movable mirror, the proposed coherent feedback scheme allows for the enhancement of both bipartite and tripartite quantum correlations. Moreover, we demonstrate that the resulting entanglement remains robust with respect to ambient temperatures in the presence of coherent feedback control.