Strong Molecule-Light Entanglement with Molecular Cavity Optomechanics

• URL: http://arxiv.org/abs/2505.21227v1
• Date: Tue, 27 May 2025 14:12:09 GMT
• Title: Strong Molecule-Light Entanglement with Molecular Cavity Optomechanics
• Authors: Hong-Yun Yu, Ya-Feng Jiao, Jie Wang, Feng Li, Bin Yin, Tian Jiang, Qi-Rui Liu, Hui Jing, Ke Wei,
• Abstract summary: We propose a molecular optomechanical platform to generate robust entanglement among bosonic modes-photons, phonons, and plasmons-under ambient conditions.<n>The system integrates an ultrahigh-Q whispering-gallery-mode (WGM) optical resonator with a plasmonic nanocavity formed by a metallic nanoparticles and a single molecule.<n>Our scheme establishes a universal approach to safeguard entanglement in open quantum systems and opens avenues for noise-resilient quantum information technologies.
• Score: 6.875161324783134
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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