Tripartite Entanglement in an Atom-Cavity-Optomechanical System |
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| Authors: | Qinghong Liao Yang Ye Peng Jin Nanrun Zhou Wenjie Nie |
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| Affiliation: | 1.Department of Electronic Information Engineering,Nanchang University,Nanchang,China;2.CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei,China;3.Department of Applied Physics,East China Jiaotong University,Nanchang,China |
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| Abstract: | We investigate tripartite entanglement in an atom-cavity-optomechanical system consisting of a two-level atom coupled to a cavity with an oscillating mirror at one end. The maximally entangled state between the atom, the field and the oscillating mirror can be prepared in the ideal case. It is shown that the atomic coherent angle that is relatively small makes tripartite entanglement much stronger against dissipative effects in a finite time interval. The parameter k plays a very important role in the oscillating frequency of the tripartite entanglement. More importantly, the π-tangle decays more quickly with the increasing of spontaneous emission rate γ and mean photon number n. |
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