Nonreciprocal entanglement in a molecular optomechanical system
arXiv:2501.14045 · doi:10.1016/j.physb.2025.417313
Abstract
We propose a theoretical scheme to generate nonreciprocal bipartite entanglement between a cavity mode and vibrational modes in a molecular cavity optomechanical system. Our system consists of molecules placed inside a spinning whispering-gallery-mode (WGM) resonator. The vibrational modes of these molecules are coupled to the WGM resonator mode (which is analogous to a plasmonic cavity) and the resonator is also coupled to an auxiliary optical cavity. We demonstrate that nonreciprocal photon-vibration entanglement and nonreciprocal vibration-vibration entanglement can be generated in this system, even at high temperatures. These nonreciprocal entanglements arise due to the Sagnac-Fizeau effect induced by the spinning WGM resonator. We find that spinning the WGM resonator in the counter-clockwise (CCW) direction enhances both types of nonreciprocal entanglement, especially under blue-detuned driving of the optical cavity mode. Furthermore, we show that vibration-vibration entanglement can be significantly enhanced by increasing the number of molecules. Our findings have potential applications in quantum information transmission and in the development of nonreciprocal quantum devices.
References in corpus (16)
- The logarithmic negativity: A full entanglement monotone that is not convex
- Optomechanical entanglement between a movable mirror and a cavity field
- Photonic quantum information processing: a review
- Optomechanical quantum information processing with photons and phonons
- Molecular cavity optomechanics: a theory of plasmon-enhanced Raman scattering
- Nonreciprocal Optomechanical Entanglement against Backscattering Losses
- Strongly enhanced light-matter interaction in a hybrid photonic-plasmonic resonator
- Continuous-Wave Frequency Upconversion with a Molecular Optomechanical Nanocavity
- Exceptional point enhances sensitivity of optomechanical mass sensors
- Nonreciprocal entanglement in cavity-magnon optomechanics
- Nonreciprocal Photon-Phonon Entanglement in Kerr-Modified Spinning Cavity Magnomechanics
- Nanocavities for Molecular Optomechanics: their fundamental description and applications
- Amplifying Frequency Up-Converted Infrared Signals with a Molecular Optomechanical Cavity
- Quantum entanglement assisted via Duffing nonlinearity
- Molecular Vibration Explorer: an online database and toolbox for surface-enhanced frequency conversion, infrared and Raman spectroscopy
- Quantum correlations enhanced in hybrid optomechanical system via phase tuning