Collective Quantum Entanglement in Molecular Cavity Optomechanics

TL;DR

This paper introduces a molecular cavity optomechanics scheme that enables room-temperature quantum entanglement of vibrational modes, leveraging collective effects and strong vibration-cavity coupling for potential quantum resource applications.

Contribution

It presents a novel collective molecular optomechanical approach for achieving robust quantum entanglement at room temperature, emphasizing the role of vibrational and plasmonic cavity interactions.

Findings

Vibration-photon entanglement persists at room temperature.

Entanglement strength increases with the number of molecules.

The scheme demonstrates delocalized vibrational entanglement via plasmonic cavities.

Abstract

We propose an optomechanical scheme for reaching quantum entanglement in vibration polaritons. The system involves $N$ molecules, whose vibrations can be fairly entangled with plasmonic cavities. We find that the vibration-photon entanglement can exist at room temperature and is robust against thermal noise. We further demonstrate the quantum entanglement between the vibrational modes through the plasmonic cavities, which shows a delocalized nature and an incredible enhancement with the number of molecules. The underlying mechanism for the entanglement is attributed to the strong vibration-cavity coupling which possesses collectivity. Our results provide a molecular optomechanical scheme which offers a promising platform for the study of noise-free quantum resources and macroscopic quantum phenomena.