本文選題：量子密鑰分發(fā)　切入點(diǎn)：連續(xù)變量　出處：《山西大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年02期 　論文類(lèi)型：期刊論文

【摘要】：量子密鑰分發(fā)能夠使得合法通信雙方共享一組無(wú)條件安全的密鑰。數(shù)據(jù)協(xié)調(diào)是量子密鑰分發(fā)過(guò)程中非常重要的一個(gè)環(huán)節(jié),能夠?qū)γ荑�分發(fā)過(guò)程中產(chǎn)生的錯(cuò)誤進(jìn)行糾錯(cuò)。低密度奇偶校驗(yàn)(LDPC)碼是一種性能接近于Shannon極限的信道糾錯(cuò)碼,適用于高效的數(shù)據(jù)協(xié)調(diào)。為了達(dá)到高的協(xié)調(diào)效率,需要根據(jù)信道的信噪比適當(dāng)?shù)剡x擇最佳的LDPC碼的碼率。我們提出了一種適用于高斯調(diào)制連續(xù)變量量子密鑰分發(fā)的碼率可調(diào)的數(shù)據(jù)協(xié)調(diào)方案:當(dāng)信道信噪比發(fā)生變化時(shí),使用碼率調(diào)整技術(shù)對(duì)數(shù)據(jù)協(xié)調(diào)過(guò)程中每一級(jí)LDPC碼的碼率進(jìn)行適當(dāng)?shù)卣{(diào)整,從而確保數(shù)據(jù)協(xié)調(diào)的效率在一定信噪比變化范圍內(nèi)能夠保持。
[Abstract]:Quantum key distribution enables both parties to share a set of unconditionally secure keys. Data coordination is a very important part of quantum key distribution. Low density parity check (LDPC) code is a channel error-correcting code whose performance is close to the limit of Shannon, which is suitable for efficient data coordination. It is necessary to select the best LDPC code rate according to the channel signal-to-noise ratio. We propose a data coordination scheme with adjustable bit-rate for Gao Si modulation continuous variable quantum key distribution: when the channel SNR changes, The bit-rate adjustment technique is used to adjust the bit rate of each LDPC code in the process of data coordination so as to ensure that the efficiency of data coordination can be maintained in a certain range of signal-to-noise ratio (SNR) changes.
【作者單位】： 山西大學(xué)光電研究所量子光學(xué)與光量子器件國(guó)家重點(diǎn)實(shí)驗(yàn)室;山西大學(xué)極端光學(xué)協(xié)同創(chuàng)新中心;
【基金】：國(guó)家自然科學(xué)基金(61378010;11504219) 國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFA0301403) 山西省高等學(xué)校創(chuàng)新人才支持計(jì)劃資助的課題
【分類(lèi)號(hào)】：O413;TN911.22;TN918.4
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本文編號(hào)：1577268