https://doi.org/10.1140/epjd/s10053-023-00654-0
Regular Article – Quantum Optics
Enhanced entanglement in the hybrid optomechanical system assisted by the nitrogen-vacancy center ensemble in diamond
1
Department of Electronic Information Engineering, Nanchang University, 330031, Nanchang, China
2
State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Frontier Science Center for Quantum Information, Tsinghua University, 100084, Beijing, China
b
nculqh@163.com
c
zhaoqm@ncu.edu.cn
Received:
12
November
2022
Accepted:
13
April
2023
Published online:
26
May
2023
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.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
