Nonreciprocal entanglement in molecular optomechanical system

• URL: http://arxiv.org/abs/2501.14045v2
• Date: Sat, 05 Apr 2025 21:30:54 GMT
• Title: Nonreciprocal entanglement in molecular optomechanical system
• Authors: K. B. Emale, Jia-Xin Peng, A. Sohail, P. Djorwe, A. -H. Abdel-Aty, N. Alessa, K. S. Nisar, S. G. Nana Engo,
• Abstract summary: We generate nonreciprocal bipartite entanglement between a cavity mode and vibrational modes in a molecular cavity optomechanical system.<n>Our findings have potential applications in quantum information transmission and in the development of nonreciprocal quantum devices.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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 $\mathcal{N}$ 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.

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