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arXiv 1306.3654quant-ph
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利用线性光学最佳集中任意部分纠缠W态

Optimal concentrating arbitrary partially entangled W states with linear optics

Lan Zhou, Yu-Bo Sheng

摘要:

分别针对任意单光子多模W态和多光子偏振W态提出了两种最优纠缠集中方案。在两种ECP中,我们只需要一对部分纠缠的W态,并且不消耗任何辅助光子。这两种ECP都是基于线性光学,可以很容易地实现。另一方面,与以往的ECP相比,我们可以保留集中的最大纠缠态。此外,对于任意单光子N模W态或N模偏振W态的浓度,总成功概率等于最小Schmidt系数模平方的N次方。这使得两个ECP都比之前的所有ECP都更优。我们的ECP可能是有用的,在当前的量子通信领域。

英文摘要:

We propose two optimal entanglement concentration protocols (ECPs) for arbitrary single-photon multi-mode W state and multi-photon polarization W state, respectively. In both ECPs, we only require one pair of partially entangled W state, and do not consume any auxiliary photon. Both ECPs are based on the linear optics which can be easily realized. On the other hand, the concentrated maximally entangled states can be remained, which are quite different from the previous ECPs. Moreover, for the concentration of the arbitrary single-photon N-mode W state or N-mode polarization W state, the total success probability is equal to Nth the modulus square of the Schmidt coefficient of the smallest magnitude. It makes both ECPs optimal than all the previous ECPs. Our ECPs may be useful in current quantum communication fields.

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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