Einstein-Podolsky-Rosen paradox and quantum steering in a three-mode optomechanical system
Einstein-Podolsky-Rosen paradox and quantum steering in a three-mode optomechanical system
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三模光机械系统中的爱因斯坦-波多尔斯基-罗森悖论和量子转向
DOI：
10.1103/physreva.89.022332
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发表时间：
2014-02
期刊：
影响因子：
--
通讯作者：
Z. Ficek
中科院分区：
文献类型：
--
作者：
Q. Y. He;Z. Ficek
我们研究了三模光机械系统中的多体纠缠、Einstein-Podolsky-罗森（EPR）态的产生以及量子操纵.腔模由短脉冲激光驱动，与反射镜有非线性参量型相互作用，与原子系综有线性分束型相互作用。镜与原子系综没有直接的相互作用。系统的动态特性存在一个阈值效应，高于此阈值时系统作为放大器工作，低于此阈值时系统作为输出场的衰减器工作。阈值由腔模与镜和原子系综的耦合强度之比确定。结果表明，在阈值以上，系统有效地表现为一个双模系统，其中可以产生一个完美的二分EPR态，而它是不可能低于阈值。此外，在阈值之上和之下都可以产生完全不可分割的三方纠缠，甚至进一步产生真正的三方纠缠。此外，我们考虑量子转向和检查一夫一妻制的关系，量化的量的二分转向，可以在不同的模式之间共享。结果表明，与腔模相比，反射镜具有更强的控制纠缠的能力。尽管原子系综和反射镜之间没有直接耦合，但它们之间存在双向转向，而直接耦合的原子系综和腔模输出之间不存在双向转向。
We study multipartite entanglement, the generation of Einstein-Podolsky-Rosen (EPR) states, and quantum steering in a three-mode optomechanical system composed of an atomic ensemble located inside a single-mode cavity with a movable mirror. The cavity mode is driven by a short laser pulse, has a nonlinear parametric-type interaction with the mirror and a linear beam-splitter-type interaction with the atomic ensemble. There is no direct interaction of the mirror with the atomic ensemble. A threshold effect for the dynamics of the system is found, above which the system works as an amplifier and below which as an attenuator of the output fields. The threshold is determined by the ratio of the coupling strengths of the cavity mode to the mirror and to the atomic ensemble. It is shown that above the threshold, the system effectively behaves as a two-mode system in which a perfect bipartite EPR state can be generated, while it is impossible below the threshold. Furthermore, a fully inseparable tripartite entanglement and even further a genuine tripartite entanglement can be produced above and below the threshold. In addition, we consider quantum steering and examine the monogamy relations that quantify the amount of bipartite steering that can be shared between different modes. It is found that the mirror is more capable for steering of entanglement than the cavity mode. The two-way steering is found between the mirror and the atomic ensemble despite the fact that they are not directly coupled to each other, while it is impossible between the output of cavity mode and the ensemble which are directly coupled to each other.
DOI：
10.1007/978-3-642-41714-6_31040
发表时间：
2014-01
期刊：
Appalachian Heritage
影响因子：
--
作者：
W. A. White
通讯作者：
W. A. White