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arXiv 2312.03040quant-ph
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非马尔可夫量子信道下的设备无关量子安全直接通信

Device-Independent Quantum Secure Direct Communication Under Non-Markovian Quantum Channels

Pritam Roy, Subhankar Bera, Shashank Gupta, A. S. Majumdar

AI总结:

本文研究非马尔可夫噪声对设备无关量子安全直接通信的影响,证明其在振幅阻尼和退相位信道下能提升安全性、降低误码率并增大通信距离。

摘要:

设备无关量子安全直接通信(DI-QSDC)是量子密码学中一种很有前景的原语,旨在解决设备缺陷和密钥管理问题。然而,要应对实际挑战仍需付出巨大努力,例如由于量子信道的退相干效应而导致的距离限制。在此,我们探索了非马尔可夫噪声的建设性作用,以提升DI-QSDC的性能。考虑由振幅阻尼信道和退相位信道建模的两种不同环境动力学,我们表明,在这两种情况下,就DI-QSDC任务的三个基准性能标准而言,非马尔可夫性相较于马尔可夫动力学带来了显著改进。具体来说,我们发现非马尔可夫噪声(i)增强了以贝尔违背度量的协议安全性,(ii)导致更低的量子比特错误率,并且(iii)通过提高秘密通信容量实现了更大的通信距离。

英文摘要:

Device-independent quantum secure direct communication (DI-QSDC) is a promising primitive in quantum cryptography aimed towards addressing the problems of device imperfections and key management. However, significant effort is required to tackle practical challenges such as the distance limitation due to the decohering effects of quantum channels. Here, we explore the constructive effect of non-Markovian noise to improve the performance of DI-QSDC. Considering two different environmental dynamics modelled by the amplitude damping and the dephasing channels, we show that for both cases non-Markovianty leads to a considerable improvement over Markovian dynamics in terms of three benchmark performance criteria of the DI-QSDC task. Specifically, we find that non-Markovian noise (i) enhances the protocol security measured by Bell violation, (ii) leads to a lower quantum bit error rate, and (iii) enables larger communication distances by increasing the capacity of secret communication.

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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