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arXiv 2308.04422quant-ph
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利用有限干涉装置驾驭高维时间纠缠

Harnessing high-dimensional temporal entanglement using limited interferometric setups

Alexandra Bergmayr, Florian Kanitschar, Matej Pivoluska, Marcus Huber

AI总结:

本文首次完成偏振-时间域高维纠缠的完整分析,提出高效认证QKD密度矩阵元素与安全参数的方法,并设计新装置以增强自由空间量子通信的抗噪声能力。

摘要:

高维纠缠已被证明在量子通信中具有显著优势。它存在于多个自由度中,尤其是在下转换(SPDC)中常规产生的时间域自由度。尽管其优势在于局部仅需单个探测器通道,但它极难分析,尤其是在量子密钥分发应用所要求的无假设方式下。我们首次完成了偏振-时间域中高维纠缠的完整分析,并展示了如何高效地认证量子密钥分发(QKD)的相关密度矩阵元素和安全参数。除了为过去的实验提供严格基础外,我们还建立了物理噪声模型,并提出了一种新颖的装置,可进一步增强自由空间量子通信的抗噪声能力。

英文摘要:

High-dimensional entanglement has shown to have significant advantages in quantum communication. It is available in many degrees of freedom and in particular in the time-domain routinely produced in down-conversion (SPDC). While advantageous in the sense that only a single detector channel is needed locally, it is notoriously hard to analyze, especially in an assumption-free manner that is required for quantum key distribution applications. We develop the first complete analysis of high-dimensional entanglement in the polarization-time-domain and show how to efficiently certify relevant density matrix elements and security parameters for Quantum Key Distribution (QKD). In addition to putting past experiments on rigorous footing, we also develop physical noise models and propose a novel setup that can further enhance the noise resistance of free-space quantum 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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