The ping-pong protocol adapted for quantum key distribution is studied in the trusted quantum noise scenario, wherein the legitimate parties can add noise locally. For a well-studied attack model, we show how non-unital, quantum non-Markovianity of the added noise can improve the key rate. We also point out that this noise-induced advantage cannot be obtained by Alice and Bob by adding local classical noise to their post-measurement data.

中文翻译：

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具有可信赖噪声的乒乓量子密钥分发：非马尔可夫优势

在可信的量子噪声场景中研究了适用于量子密钥分配的乒乓协议，其中合法方可以在本地添加噪声。对于一个经过充分研究的攻击模型，我们展示了所添加噪声的非单位，量子非马尔可夫性如何能够提高密钥率。我们还指出，爱丽丝和鲍勃无法通过将局部经典噪声添加到其后测量数据中来获得这种噪声诱发的优势。