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Enhanced entanglement in the hybrid optomechanical system assisted by the nitrogen-vacancy center ensemble in diamond

  • Regular Article – Quantum Optics
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Abstract

We theoretically present a scheme for enhancing the entanglement between the two mechanical resonators in a hybrid optomechanical system which is consisted of two mechanical resonators coupled via Coulomb field, two cavities and a nitrogen-vacancy (NV) center ensemble inside the left cavity. We demonstrate that the enhancement of mechanical entanglement is strongly manipulated by the Coulomb coupling strength. Our result also shows that the collective spin coupling strength plays an important role in attaining the reinforced mechanical entanglement. Moreover, the mechanical entanglement can be increased by properly selecting the optomechanical coupling strength and other system parameters. Further, it is found that the steady-state entanglement of the hybrid system can be obtained easily in a large range of parameters. Our work provides broad potential applications in the investigation of quantum information processing and the preparation of quantum devices.

Graphical abstract

Quantum entanglement, cavity optomechanics, NV center ensemble, Coulomb coupling.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors comment: The manuscript has no data associated with it].

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Acknowledgements

This project was supported by the National Natural Science Foundation of China (Grant No. 62061028), the Opening Project of Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology (Grant No. ammt2021A-4), the Foundation for Distinguished Young Scientists of Jiangxi Province (Grant No. 20162BCB23009), the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics (Grant No. KF202010), the Interdisciplinary Innovation Fund of Nanchang University (Grant No. 9166-27060003-YB12), and the Open Research Fund Program of Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education (Grant No. OEIAM202004).

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Authors and Affiliations

  1. Department of Electronic Information Engineering, Nanchang University, Nanchang, 330031, China

    Ruochuang Liu, Qinghong Liao, Qingmin Zhao & Zhuo Zhang

  2. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Frontier Science Center for Quantum Information, Tsinghua University, Beijing, 100084, China

    Qinghong Liao

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  1. Ruochuang Liu
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  2. Qinghong Liao
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Contributions

QL: Supervision, Conceptualization, Methodology, Writing—Reviewing and Editing. RL: Writing—Original draft preparation, Data curation. QZ: Visualization, Investigation. ZZ: Validation.

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Correspondence to Qinghong Liao or Qingmin Zhao.

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Liu, R., Liao, Q., Zhao, Q. et al. Enhanced entanglement in the hybrid optomechanical system assisted by the nitrogen-vacancy center ensemble in diamond. Eur. Phys. J. D 77, 84 (2023). https://doi.org/10.1140/epjd/s10053-023-00654-0

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