Exploring quantum correlations in a hybrid optomechanical system

TL;DR

This paper proposes a scheme using two coupled optomechanical cavities with photon and phonon hopping to enhance intracavity entanglement, analyzing quantum correlations and stability conditions with experimentally relevant parameters.

Contribution

It introduces a novel configuration of coupled optomechanical cavities employing photon and phonon hopping to control and enhance intracavity quantum entanglement.

Findings

Entanglement can be increased by optimizing photon and phonon hopping strengths.

Quantum measures like logarithmic negativity and steering reveal the nature of correlations.

Stability conditions depend on coupling parameters and are crucial for experimental realization.

Abstract

In quantum simulations and experiments on optomechanical cavities, coherence control is a challenging issue. We propose a scheme of two coupled optomechanical cavities to enhance the intracavity entanglement. Photon hopping is employed to establish couplings between optical modes, while phonon tunneling is utilized to establish couplings between mechanical resonators. Both cavities are driven by classical light. We explore the influences of coupling strengths of the quantum correlations generated inside each cavity using two types of quantum measures: logarithmic negativity and quantum steering. This analysis will reveal the significance of these quantum metrics as well as their various aspects in the Doppler regime. We also investigate stability conditions based on coupling strengths. Therefore, it is possible to quantify the degree of intracavity entanglement. The generated entanglement can be enhanced by choosing the appropriate photon and phonon hopping strengths. A set of parameters based on the currently available experimental data was used in the calculations.