Extracted work as a measure of entanglement in optomechanics

Abstract

In this work, we investigate the quantum entanglement and the work extraction in two distinct optomechanical systems. The first system consists of two spatially separated Fabry–Péro cavities driven by squeezed light in the resolved-sideband regime, while the second system comprises a laser field incident on a vibrating mirror. We analyze the entanglement dynamics between optical and mechanical modes, as well as quantum correlations in a mixed optomechanical bipartite system (optic–optic mode) mediated by radiation pressure. By using logarithmic negativity as a measure, we quantify the entanglement evolution in both optic–optic and mirror–mirror bipartite subsystems. Furthermore, we show how three distinct types of extractable works vary with system parameters and examine their relationship with entanglement. Our results highlight the relationship between quantum correlations and extracted work in optomechanical system, offering insights for quantum information processing and energy transfer in hybrid systems.