Lower bound on concurrence and distillation for arbitrary-dimensional bipartite quantum states
Lower bound on concurrence and distillation for arbitrary-dimensional bipartite quantum states
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DOI：
10.1103/physreva.84.062322
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发表时间：
2011-09
影响因子：
2.9
通讯作者：
Ming-Jing Zhao;Xue-Na Zhu;S. Fei;X. Li-Jost
中科院分区：
文献类型：
--
作者：
Ming-Jing Zhao;Xue-Na Zhu;S. Fei;X. Li-Jost
给出了任意维二体量子态的纠缠度的一个下界。这个下界可以用来改进所有已知的并发性下界。此外，该下界给出了量子纠缠可纠缠性的一个可操作的充分判据。我们的结果的意义说明了定量评估的纠缠态，无法识别的通常的并发估计方法和显示的可并行性的混合状态，不能识别的可并行性标准。
We present a lower bound of concurrence for arbitrary-dimensional bipartite quantum states. This lower bound may be used to improve all the known lower bounds of concurrence. Moreover, the lower bound gives rise to an operational sufficient criterion of distillability of quantum entanglement. The significance of our result is illustrated by quantitative evaluation of entanglement for entangled states that fail to be identified by the usual concurrence estimation method and by showing the distillability of mixed states that cannot be recognized by other distillability criteria.