基于相干態(tài)光場的連續(xù)變量測量設(shè)備無關(guān)Cluster態(tài)量子通信
doi: 10.11999/JEIT190661
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密碼科學(xué)技術(shù)國家重點實驗室 北京 100878
基金項目: 國家自然科學(xué)基金(61602045, 61602046)，國家重點研發(fā)計劃(2016YFA0302600, 2018YFA0306404)
Continuous Variable Measurement-Device-Independent Cluster State Quantum Communication Based on Coherent State
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State Key Laboratory of Cryptology, Beijing 100878, China
Funds: The National Natural Science Foundation of China (61602045, 61602046), The National Key Research and Development Program of China (2016YFA0302600, 2018YFA0306404)
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摘要: 由于量子通信協(xié)議理論上可以發(fā)現(xiàn)任何竊聽者的攻擊行為，因此其天然具有抗量子計算機攻擊的能力。高斯相干態(tài)光場相較于糾纏態(tài)光場更容易制備和實現(xiàn)，利用其實現(xiàn)量子通信網(wǎng)絡(luò)更具經(jīng)濟價值和實用價值。該文提出一種利用連續(xù)變量(CV)相干態(tài)光場就可以實現(xiàn)的測量設(shè)備無關(guān)(MDI)Cluster態(tài)量子通信網(wǎng)絡(luò)協(xié)議。在此網(wǎng)絡(luò)上可以方便地執(zhí)行量子秘密共享(QSS)協(xié)議和量子會議(QC)協(xié)議。該文提出了線型Cluster態(tài)實現(xiàn)任意部分用戶間QSS協(xié)議、星型Cluster態(tài)四用戶QSS協(xié)議和QC協(xié)議，并利用糾纏模型分析了選用對稱和非對稱網(wǎng)絡(luò)結(jié)構(gòu)時，每種協(xié)議密鑰率和傳輸距離之間的變化關(guān)系。結(jié)論為在量子網(wǎng)絡(luò)中利用相干態(tài)實現(xiàn)QSS和QC協(xié)議提供了理論依據(jù)。
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關(guān)鍵詞:
- 量子通信 /
- 相干態(tài) /
- 連續(xù)變量 /
- 測量設(shè)備無關(guān) /
- Cluster態(tài)
Abstract: Even attacks by quantum computer can be theoretically discovered if utilizing quantum communication protocols. Compared with entangled states, the Continuous Variable (CV) Gaussian coherent state is easier to be prepared. The schemes of quantum communication network based on coherent state will be more economical and practical. A Measurement-Device-Independent (MDI) Cluster state quantum communication network scheme by using coherent state is proposed. Quantum Secret Sharing (QSS) and Quantum Conference (QC) protocols can be implemented in this network. A linear Cluster state scheme is poposed to implement t-out-of-n QSS protocol, a star Cluster state scheme to implement four-user QSS protocol and QC protocol. The entanglement-based CV MDI scheme is used to analyze the relationship between the key rates and transmission distance for each symmetric and asymmetric protocol. The presented schemes provide a concrete reference for establishing CV MDI quantum QSS and QC protocol in quantum networks by using coherent state. -
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