Entanglement enhancement in cavity magnomechanics by an optical parametric amplifier

TL;DR

This paper demonstrates that incorporating an optical parametric amplifier into cavity magnomechanics significantly enhances bipartite and tripartite entanglement, broadening operational regimes and improving robustness against temperature effects.

Contribution

It introduces a novel method using an optical parametric amplifier to enhance and stabilize quantum entanglement in cavity magnomechanics systems.

Findings

Entanglement is significantly enhanced by the OPA.

The domain of entanglement extends over wider detuning ranges.

Robustness of entanglement against temperature increases.

Abstract

We propose a method to enhance bipartite and tripartite entanglement in cavity magnomechanics using an optical parametric amplifier (OPA). We analyze this system and identified parametric regimes where different types of entanglement are enhanced. We show that a proper choice of the phase of the parametric amplifier leads to the enhancement of the bipartite entanglements. Moreover, the tripartite entanglement is also significantly enhanced in the presence of OPA. The OPA not only enhances the strength of entanglement but also increases the domain of entanglement over a wider space of detunings as compared to the system when no OPA is present. Similarly, the robustness of entanglement against temperature is also enhanced. Another important consequence of OPA is the fact that it relaxes the requirement of strong magnon-phonon coupling to generate cavity-magnon entanglement which is necessary for the case when OPA is not present. We believe that the presented scheme is a step forward to realize robust quantum entanglement using current technology.