Research On Quantum Network Coding Protocol Using Approximate Cloning

With the continuous progress of quantum communication technology,the construction of global communication networ-k has become an inevitable trend.With the increasing scale of network users,network link transmission is facing serious communication problems such as transmission congestion and channel noise,and network coding emerges.Network coding has shown superior performance in solving network congestion and other problems.The idea of network coding has been applied in the field of quantum communication,and quantum network coding has emerged.In the research of quantum network coding,researchers try to make a breakthrough in the efficiency of quantum communication network.At present,the perfect lossless transmission of quantum information is still in an ideal state,so the approximate cloning of quantum information(close to lossless transmission)has become a viable alternative.This paper focuses on the design,transmission efficiency and demonstration of quantum network coding protocol based on approximate cloning.On the basis of previous studies,a quantum network coding protocol based on approximate cloning is proposed,and the performance of the protocol is analyzed and the protocol process is simulated.The main research work of this paper includes the following two aspects:First,a quantum network coding protocol based on approximate cloning is proposed.Firstly,by applying pervasive cloning to cup and butterfly networks,a quantum network coding protocol based on approximate cloning is proposed.Secondly,an ACR operation is designed,which is an extension of pre-shared entanglement and is used to transmit information perfectly.This operation is applied to the protocol.An improved protocol of quantum network coding protocol based on approximate cloning is proposed,and the push is considered.It can be used in more general network models.Finally,the performance of the proposed quantum network coding protocol is analyzed.Through theoretical analysis,the quantum network coding protocol based on approximate cloning is feasible and has high transmission efficiency and security.Secondly,a simulation demonstration of quantum network coding protocol based on approximate cloning is designed and implemented.Considering the functional requirements of this demonstration,it mainly includes the demonstration of network topology,the demonstration of detailed protocol process,the detailed process of input and output,and the comparison of transmission fidelity of each protocol.Firstly,the design shows the definition and interpretation of coding operations designed in the protocol;secondly,the design shows the operation and results of each step of the protocol process,making the process clearer;finally,the design realizes the performance comparison of the protocol.Considering the above functions of simulation demonstration,a computer programming language which is easier to realize graphical interface is adopted to compile the simulation demonstration.Through analysis,the simulation demonstration of the design and implementation can complete the demonstration task of the protocol process.