单光子纠缠态的纠缠浓缩(英文)

Entanglement Concentration of Single-photon Entangled States

通过分析光学分束器对单光子态的作用特点,描述了一个利用单光子态和真空态制备纠缠单光子态的方法;提出了一个实现单光子纠缠态纠缠浓缩的方案。在这个方案中,两个单光子部分纠缠态被用来作为量子信道,通过利用光学分束器作用和单光子探测器探测完成了这个纠缠浓缩的过程。结果表明,对于单光子纠缠态,利用这种方法总有一定的几率可以从部分纠缠纯态中提纯出最大纠缠态。

By the analysis of the action characteristic of the beam-splitter, presenting a method of generating the single-photon entangled states utilizing optics beam-splitter and single-photon source. A scheme on entanglement concentration of the single-photon entanglement states is designed. In this scheme, the two single-photon partially entangled states are utilized as the quantum channel. The process of the entanglement concentration is achieved, by using the 50/50 symmetric beam splitters, the photon detectors and with the help of classical information. Results show that to distill some maximally entangled states from partially entangled pure states is possible by using this method.