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Effect of an auxiliary mode on bipartite entanglement in a dissipative three-mode optomechanical system

机译:辅助模式对耗散三模光机系统中二分缠结的影响

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The influence of a fast damped auxiliary mode on the creation of bipartite entanglement in a dissipative three-mode optomechanical system is investigated. We show how the reduction of fluctuations of the modes and the creation of the entanglement depend on the type of the coupling between the auxiliary and the other modes. A detailed calculation of the inseparability parameter is presented for three different types of couplings possible in the system: (a) nonlinear parametric-type, (b) linear-type, and (c) linear-type coupling to one of the two modes and parametric-type coupling to the other mode. Our calculations reveal the necessity of having a parametric-type coupling in the system. We find, however, that the presence of the linear-type rather than the parametric-type coupling protects the modes from excess noise. In particular, we show that in (a)-(c) cases a strong linear-type coupling between some of the mode leads to a significant reduction of the fluctuations of the modes, and in the (b) and (c) cases the presence of a strong linear-type coupling between the auxiliary and the other modes results in an entanglement between the modes.
机译:研究了快速阻尼辅助模式对耗散三模光机系统中的二分缠结的产生的影响。我们展示了如何减少模式的波动和创建纠缠取决于辅助和其他模式之间的耦合的类型。在系统中提供了用于三种不同类型的耦合的Inseperability参数的详细计算:(a)非线性参数型,(b)线性型,(c)线性型耦合到两种模式之一和参数型耦合到另一个模式。我们的计算揭示了在系统中具有参数型耦合的必要性。然而,我们发现,线性型而不是参数型耦合的存在保护模式免受过量噪声。特别地,我们表明,在(a) - (c)情况下,一些模式之间的强线性型耦合导致模式波动的显着降低,以及(b)和(c)案例在辅助和其他模式之间存在强线性型耦合,导致模式之间的缠结。

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