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arXiv quant-ph/0510105quant-ph
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通过传播操纵量子信息

Manipulating quantum information by propagation

Alvaro Perales, Martin B. Plenio

摘要:

我们研究了耦合量子谐振子结构中两体和多体连续变量纠缠的产生。通过调整近邻粒子间的相互作用强度,我们给出了在输入臂的第一个振子中产生初始单模压缩态的Y型结构中,如何最大化臂间纠缠的产生,并将该结构看作一个近似的量子克隆器.对于系统动力学中的特定时间,输出臂中的最后一个振子可以被认为是初始状态的不完美副本。通过增加结构中的臂的数量,获得多体纠缠,以及1到M克隆。最后,我们考虑的配置,实现了初始纠缠态的对称分裂。所有的计算都是在量子光学中的旋波近似的框架内进行的,我们的预测可以用现有的实验技术进行检验。

英文摘要:

We study creation of bi- and multipartite continuous variable entanglement in structures of coupled quantum harmonic oscillators. By adjusting the interaction strengths between nearest neighbors we show how to maximize the entanglement production between the arms in a Y-shaped structure where an initial single mode squeezed state is created in the first oscillator of the input arm. We also consider the action of the same structure as an approximate quantum cloner. For a specific time in the system dynamics the last oscillators in the output arms can be considered as imperfect copies of the initial state. By increasing the number of arms in the structure, multipartite entanglement is obtained, as well as 1 to M cloning. Finally, we are considering configurations that implement the symmetric splitting of an initial entangled state. All calculations are carried out within the framework of the rotating wave approximation in quantum optics, and our predictions could be tested with current available experimental techniques.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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