We show the enhancement of a distillable key rate for quantum key distribution (QKD) by local filtering for several bound entangled states. Through our paper, it becomes evident that the local filtration operations, whereas transforming one bound entangled state to another, have the potential to increase the utility of the new state for QKD. We demonstrate three examples of “one-way distillable key rate” enhancement by local filtering and, in this process, discover new bound entangled states which are key distillable.

中文翻译：

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通过使用局部过滤从绑定的纠缠状态增加可蒸馏密钥速率

我们显示了通过对几个绑定纠缠态进行局部滤波，可以提高量子密钥分配（QKD）的可蒸馏密钥速率。通过我们的论文，很明显的是，局部过滤操作将一个绑定的纠缠状态转换为另一个纠缠状态，有可能增加新状态对QKD的实用性。我们演示了通过局部滤波增强“单向可蒸馏密钥速率”的三个示例，并在此过程中发现了可密钥蒸馏的新的绑定纠缠状态。