Memory effect induced macroscopic-microscopic entanglement

TL;DR

This paper investigates how non-Markovian environmental effects influence optomechanical entanglement, revealing that environment memory can be used to modulate and optimize entanglement between a cavity field and a movable mirror.

Contribution

It introduces a model demonstrating the impact of environment memory effects on optomechanical entanglement and shows how to control entanglement via environment parameters.

Findings

Environment memory affects entanglement strength.

Optimal detuning depends on memory effect.

Environment frequency modulates entanglement.

Abstract

We study optomechanical entanglement between an optical cavity field and a movable mirror coupled to a non-Markovian environment. The non-Markovian quantum state diffusion (NMQSD) approach and the non-Markovian master equation are shown to be useful in investigating the entanglement generation between the cavity field and the movable mirror. The simple model presented in this paper demonstrates several interesting properties of optomechanical entanglement that are associated with environment memory effects. It is evident that the effective environment central frequency can be used to modulate the optomechanical entanglement. In addition, we show that the maximum entanglement may be achieved by properly choosing the effective detuning which is significantly dependent on the strength of the memory effect of the environment.