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arXiv 2406.04263quant-ph
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在连续变量测量设备无关量子密钥分发中,光子减除和位移没有实质优势

No real advantage of photon subtraction and displacement in continuous variable measurement device independent quantum key distribution

Chandan Kumar, Sarbani Chatterjee, Arvind

AI总结:

本文批判性分析了单光子减除和位移操作对连续变量测量设备无关量子密钥分发性能的提升作用,发现两者均无实质益处,并呼吁重新审视非高斯操作在量子信息协议中的效用。

摘要:

我们批判性地分析了单光子减除(SPS)和位移在提升连续变量测量设备无关量子密钥分发(CV-MDI-QKD)性能中的作用。我们考虑了在位移双模压缩真空态上实施SPS生成资源态的CV-MDI-QKD。通过状态参数优化密钥率表明,实施SPS在提升CV-MDI-QKD的损耗容忍度方面毫无益处。此外,我们发现位移对改善CV-MDI-QKD的性能同样无效。尽管我们的结果与该领域关于SPS和位移在CV-MDI-QKD中效用的普遍看法相反,但它也呼吁重新审视非高斯操作在提升各种量子信息处理协议效率中的作用。

英文摘要:

We critically analyse the role of single photon subtraction (SPS) and displacement in improving the performance of continuous variable measurement device independent quantum key distribution (CV-MDI-QKD). We consider CV-MDI-QKD with resource states generated by SPS on a displaced two-mode squeezed vacuum state. Optimizing the secret key rate with state parameters reveals that implementing SPS yields no benefits in improving the loss tolerance of CV-MDI-QKD. Additionally, we find that displacement too is not useful in improving the performance of CV-MDI-QKD. While our result is in contradistinction with the widely held belief in the field regarding the utility of SPS and displacement in CV-MDI-QKD, it also calls for a re-examination of the role of non-Gaussian operations in increasing the efficiency of various quantum information processing protocols.

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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