Research On The Architecture And Routing Technology Of Quantum Information Networks Based On Quantum Repeater

With the development of computing capacity of personal computer and supercomputer, the classical cryptography may encounter to be broken. In recent year, withthe deeply study of the quantum theory and information theory, researchers found thatsingle photon which has inherent quantum randomness can achieve unconditionalsecurity in confidential communication. Quantum key distribution can provide absolutesecurity key and combine with communication network can be used for confidentialsecure communication. In the quantum key distribution processing, the eavesdroppercan be detected effectively. Nowadays, all of the deployed quantum informationnetworks have limited quantum nodes and less have routing related technology. Whenthe scale of quantum information network becomes larger, how to extend thetransmission distance and how to choose the best path will become a very difficultproblem.For all deployed quantum information networks, the number of quantum nodes issmall and the transmission distance between two nodes is limited. In this paper, wepropose a quantum information network model that based on atomic ensembles andlinear optics quantum repeater. We study the network structure and networkingsolutions based on this specific physical implementation of quantum informationnetwork. Then, we present and design a routing algorithm based on the quantuminformation network. The main research works are as follows:Firstly, this paper briefly describes the basic knowledge of quantum mechanisminvolved in quantum information network and the realization details of quantumrepeaters based on atomic ensembles. Based on different physical implementation ofquantum information networks, we discuss, respectively, the routing technology usingin these quantum networks.Secondly, this paper presents a quantum information network architecture based onatomic ensembles quantum repeater. Compared with classical communication network,we summarize the different points and similar points between them. Under quantuminformation network model based on atomic ensembles quantum repeater, we propose afive-layer structure model and detailed description of the function of each level.Thirdly, referring to the proposed quantum information network architecture weanalyze the performance parameters that should be considered in the processing of therealization of quantum repeater based on atomic ensembles. Through categorize andsimplify the performance parameters in the processing of realization of quantumrepeater, we propose quantum information network routing algorithm based on atomicensembles quantum repeater. We call it the Least Delay Time of EntanglementDistribution routing algorithm (LDTED). Finally, in this paper we design and implement emulator based on CORE, used forquantum information network that based on atomic ensembles quantum repeater. Usingthis emulator, we verify the validity of the designed and implemented routing algorithm.According to the test results of simulation we analysis the performance of the proposedLDTED routing algorithm.