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arXiv 0912.2402quant-ph
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原子系统中连续变量纠缠纯化

Continuous-variables entanglement purification with atomic systems

Stojan Rebic, Stefano Mancini, Giovanna Morigi, David Vitali

摘要:

提出了一种对两个传播光场的连续变量量子态进行纠缠纯化的方案。该方案是基于让每个字段与一个本地节点,原子系综,其内部的集体激发的作用,辅助连续变量资源的相互作用。纠缠纯化是通过二分法测量实现的,代表所需的非高斯元素,并且其包括检测原子系综中集体激发的存在或不存在。该方案可以扩展到网络,其中节点是单个被囚禁原子,并构成了实现连续变量量子中继器的重要组成部分。

英文摘要:

We present a proposal for entanglement purification of the continuous-variable quantum state of two propagating optical fields. The scheme is based on letting each field interact with a local node, an atomic ensemble, whose internal collective excitation plays the role of an ancillary continuous variable resource. Entanglement purification is achieved by a dichotomic measurement, representing the required non-Gaussian element, and which consists in detecting the presence or absence of collective excitations in the atomic ensemble. This scheme can be extended to networks, where the nodes are single trapped atoms, and constitutes an important building block for the implementation of a continuous-variable quantum repeater.

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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