Strong Molecule-Light Entanglement with Molecular Cavity Optomechanics
Abstract
We propose a molecular optomechanical platform to generate robust entanglement among bosonic modes-photons, phonons, and plasmons-under ambient conditions. The system integrates an ultrahigh-Q whispering-gallery-mode (WGM) optical resonator with a plasmonic nanocavity formed by a metallic nanoparticle and a single molecule. This hybrid architecture offers two critical advantages over standalone plasmonic systems: (i) Efficient redirection of Stokes photons from the lossy plasmonic mode into the long-lived WGM resonator, and (ii) Suppression of molecular absorption and approaching vibrational ground states via plasmon-WGM interactions. These features enable entanglement to transfer from the fragile plasmon-phonon subsystem to a photon-phonon bipartition in the blue-detuned regime, yielding robust stationary entanglement resilient to environmental noise. Remarkably, the achieved entanglement surpasses the theoretical bound for conventional two-mode squeezing in certain parameter regimes. Our scheme establishes a universal approach to safeguard entanglement in open quantum systems and opens avenues for noise-resilient quantum information technologies.
Keywords
Cite
@article{arxiv.2505.21227,
title = {Strong Molecule-Light Entanglement with Molecular Cavity Optomechanics},
author = {Hong-Yun Yu and Ya-Feng Jiao and Jie Wang and Feng Li and Bin Yin and Tian Jiang and Qi-Rui Liu and Hui Jing and Ke Wei},
journal= {arXiv preprint arXiv:2505.21227},
year = {2025}
}