Quantum correlations in molecular cavity optomechanics

TL;DR

This paper presents a theoretical framework for generating and controlling robust quantum correlations in a molecular cavity optomechanical system, demonstrating potential for room-temperature quantum information processing and sensing applications.

Contribution

It introduces a novel approach leveraging strong cavity-molecular interactions to enhance quantum correlations and shows their robustness against thermal noise up to 1000 K.

Findings

Enhanced entanglement, quantum steering, and discord via optimized coupling.

Cavity-cavity correlations mediated by molecular modes.

Quantum entanglement persists at high temperatures (~1000 K).

Abstract

Quantum correlations are interesting resources for modern quantum technologies such as quantum information processing, quantum communication, quantum teleportation, and quantum computation tasks. However, engineering these quantum states turns to be not an easy task. Here, we unveil a theoretical framework for generating and controlling quantum correlations within a double-cavity molecular optomechanical (McOM) system. Our approach leverages strong interactions between confined optical fields and collective molecular vibrations, creating a versatile environment for exploring robust quantum correlations. Our findings reveal that by judiciously optimizing the coupling strength between the cavity field and the molecular collective mode leads to significant enhancement of entanglement, quantum steering, and quantum discord. We demonstrate that cavity-cavity quantum correlations can be effectively mediated by the molecular collective mode, enabling a unique pathway for inter-cavity quantum connectivity. Moreover, the quantum entanglement generated in our McOM system exhibits robustness against thermal noise, persisting up to temperatures approaching $1000 K$. This strong resilience, qualifies molecular optomechanics as a compelling architecture for scalable, room-temperature quantum information processing and the practical realization of quantum networks. Additionally, the phase-dependent behaviour of quantum discord provides a fundamental basis for developing ultra-sensitive gas sensors, with potential applications in environmental monitoring, medical diagnostics, and industrial safety.