Research On Quantum Wireless Network Communication Scheme Based On Measurement

As a new type of communication technology,quantum communication is an important research direction in quantum information.At present,quantum communication mainly involves quantum teleportation,quantum key distribution and quantum superdense coding.It adopts quantum state as the carrier of information transmission,and makes use of the characteristics of quantum entanglement,which can supplement and improve the existing traditional communication system in the aspects of enhancing the communication security and expanding the information carrying capacity.With the continuous development of quantum communication technology,quantum wireless network has been widely concerned because of its flexible characteristics,which enables information to be transmitted between nodes more safely and efficiently.Quantum teleportation can make use of the properties of entangled particles to enable unknown quantum states to be transmitted between long-distant quantum systems,which is suitable for quantum wireless networks.On the one hand,quantum entanglement resources are one of the important factors that affect the efficiency of long-distance information transmission.If there is no appropriate and sufficient quantum entanglement resources in the network,the range of network communication will be limited.The cluster state has been proved to be more robust to noise;on the other hand,two nodes in the quantum wireless network are not necessarily directly connected,and may require the help of multiple intermediate nodes to complete the transmission of information.Therefore,this dissertation studies the quantum wireless network communication scheme based on measurement: it is meaningful to use a new class of cluster state as a quantum channel to make all nodes in the routing path share entanglement resources,and then realize the one-way and the bidirectional quantum wireless network communication based on the Von Neumann measurement results of multi-nodes.The work of this dissertation mainly includes the following aspects:(1)Two quantum teleportation protocols based on discrete-time quantum walks are proposed.Furthermore,a one-way quantum wireless network communication scheme based on measurement is proposed,which can transmit unknown single quantum state and two quantum states respectively.For different network topologies,the 1-D,2-D and 3-D cluster states are used to construct quantum channels,and the cluster entangled particles are reasonably distributed to each node.Then according to the Von Neumann measurement result of each node,the destination node performs the corresponding recovery operation.We compare the scheme with existing solutions in terms of classical communication overhead and quantum communication overhead.At last,the security analysis on eavesdropping attacks is carried out.The proposed scheme reduces resource consumption and operation complexity under the premise of ensuring security.(2)The bidirectional quantum wireless network communication scheme based on measurement is proposed.This dissertation mainly analyzes the situation in which the nodes in the network are minimum odd and minimum even,summarizes the possible combination of measurement results and corresponding recovery operations of multiple nodes.Then we simulate the process of establishing entanglement between eavesdropping attackers and intermediate nodes to obtain the information of unknown quantum state.Compared with existing solutions,the proposed solution improves transmission efficiency and has certain security.(3)This dissertation introduces the bilayer quantum wireless network which is divided into the backbone network and the client network,and applies the communication scheme mentioned above to the bilayer quantum wireless network architecture.We proposes one-way and bidirectional quantum wireless network communication protocols based on measurement under the bilayer network architecture.The transmission process of unknown quantum state information by sender,host location register,each intermediate node,cluster state generator and receiver is described in detail.At last,the feasibility of the protocol is analyzed.