Dissipation-induced optomechanical entanglement with the assistance of Coulomb interaction
Dissipation-induced optomechanical entanglement with the assistance of Coulomb interaction
复制标题
库仑相互作用辅助下的耗散诱导光机械纠缠
DOI：
10.1103/physreva.91.022326
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发表时间：
2015-02-20
影响因子：
2.9
通讯作者：
Zheng, Shi-Biao
中科院分区：
文献类型：
--
作者：
Chen, Rong-Xin;Shen, Li-Tuo;Zheng, Shi-Biao
我们考虑了一个混合三模光机械系统，其中一个机械振子通过库仑力耦合到另一个机械振子，并通过光机相互作用耦合到腔模。结果表明，通过将Bogoliubov模作为工程库来有效冷却Bogoliubov模，可以实现静态腔-机械纠缠。通过仔细平衡有效耦合比的两个对峙效应，可以使纠缠最大化。此外，我们还详细分析了非共振项的影响。结果表明，当系统的稳定区域在大的协和性条件下在参数平面内收缩时，最大纠缠度并没有被非共振项显著减小。我们在稳定区数值优化了这一比例，并在大协作性区域得到了非常强的纠缠。
We consider a hybrid three-mode optomechanical system where one mechanical oscillator couples to a second one via a Coulomb force and to a cavity mode via an optomechanical interaction. It is shown that stationary cavity-mechanical entanglement can be achieved by effectively cooling a Bogoliubov mode via the intermediate mode acting as an engineered reservoir. The entanglement can be maximized by carefully balancing the two confronting effects of the ratio of the effective couplings. Moreover, we analyze in detail the effects of the nonresonant terms. It is found that while the stability zone of the system shrinks in the parameter plane for large cooperativity, the maximal entanglement is not significantly reduced by the nonresonant terms. We numerically optimize the ratio in the stable region and obtain remarkably strong entanglement in the large cooperativity regime.