Abstract
In this paper, we propose a scheme to show signatures of multipartite optomechanical entanglement, which is based on two high quality factor (high-\(Q\)) silicon nitride (\(\text{ Si }_{3}\text{ N }_{4}\)) microdisk cavities coupled to a nanostring waveguide via evanescent field. Genuine tripartite optomechanical entanglement is shared in the subsystem even though the two fields of microdisk cavities do not have direct interaction. In addition, we study the behaviors of the bipartite entanglement between the pairs of the system constituents by numerical simulation.






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Acknowledgments
This work was supported by the National Natural Science Foundation of China under grant no. 11047122 and no. 11105030, the Natural Science Foundation of Fuzhou University of China under grant no. XRC-0976 and no.2010-XQ-28, the SRTP Foundation of Fuzhou University of China under grant no. 16118, the funds from Education Department of Fujian Province of China under grant no. JA11005, no. JA10009 and no. JA10039, the National Natural Science Foundation of Fujian Province of China under grant no. 2010J01006 and 2012J01269, the Foundation of Ministry of Education of China under grant no. 212085.
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Shi, ZC., Xia, Y. & Song, J. Emergence of multipartite optomechanical entanglement in microdisk cavities coupled to nanostring waveguide. Quantum Inf Process 12, 3179–3190 (2013). https://doi.org/10.1007/s11128-013-0590-0
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DOI: https://doi.org/10.1007/s11128-013-0590-0