Wireless Quantum Communication Network Research Based On GHZ State

Quantum information,using quantum state as a new type of transmission media has re-ceived widespread attention at home and abroad.Quantum communication technology is one of the hot research field of quantum information.Nowdays,the quantum teleportation is widely used in the research of quantum communication.In this study,based on wireless quantum communication network,a protocol that uses a partially entangled Greenberger-Home-Zeilinger(GHZ)state for single hop teleportation is proposed.And a protocol to realize multiple teleportation of partially entangled GHZ state is presented.In the background of wireless quantum communication network,a model of quantum communicaiton network based on mesh bacbone is proposed and a quantum routing protocol used in multi-hop quantum teleporation has been designed.First of all,this paper selects partially entangled GHZ state as quantum channel and pro-poses a single hop quantum teleportation protocol.In the single hop quantum teleportation scheme,an auxiliary particle is introduced to the destination node and an unitary matrix is used to recover the transmitted quantum information.Then,to realize remote transmission of the quantum information in quanum communication network,consider the multiple teleportation.The two-hop quantum teleportation scheme is analyzed.it can be found that if there is no auxil-iary particle in the destination node,it can also be successful to recover the transmitted quantum information.On this basis,two multi-hop quantum teleportation schemes are proposed.The first protocol is without auxiliary particles,and when the transmission hop is odd,the probabil-ity of success is always 0.In the second protocol,regardless of whether the transmission hop is odd or even,the multiple teleportation protocol with auxiliary particles is more effcient.Secondly,considering that quantum information need to be transmitted in quantum comm-munication network,a model of multi-hop quantum communicaiton network has been proposed.Based on the traditional WMN,a mesh structure is introduced to wireless quantum communica-tion,this network has two channels,wireless communication channels and quantum channels.Besides,this paper selects partially entangled GHZ state as quantum channel and a quantum routing protocol with multi-hop teleportation for the wireless mesh network is proposed.In the process of quantum routing establishment,the direct quantum channel between the node and destination node is established too.In the end,the direct quantum channel between the source node and destination node is established.So the measurement result can be transmitted from source node to destination node.At this point,compared with the traditional routing protocols,this agreement does not need to jump line by open packets,quantum measurement and in the measurement results,reducing the transmission delay.Compared with the traditional routing protocols,this protocol does not need to open result packet and do quantum measurement hop by hop,so the transmission delay is reduced.Finally,the success probability of quantum route establishment is simulated.This paper specifically analyzes and deduces the process of quantum channel establishment.Then,with specific examples,from two aspects of routing requests and routing reply,routing protocols are analyzed.Moreover,by the specific simulation example,the paper analyzes success probability of the multi-hop quantum teleportation in wireless quantum mesh backbone network,and quan-tum multi-hop teleportation in wireless mesh backbone networks through a partially entangled GHZ state is feasible.