Research On Quantum Teleportation And Its Route Optimization

Quantum informatics is a new interdisciplinary subject based on the fusion of quantum mechanics and information science.It consists of quantum communication and quantum computing.The quantum teleportation in quantum communication uses the physical properties of quantum mechanics through shared quantum entanglement.The pair acts as a quantum channel to realize the transmission of information.Compared with classical communication,quantum teleportation has obvious advantages in terms of information capacity and security.Based on the previous studies,this thesis studies the quantum teleportation from its theoretical scheme and quantum circuit optimization.The details are as follows:Firstly,the theoretical implementation scheme of quantum teleportation is studied.The implementation scheme of classical quantum teleportation is introduced.Then the implementation scheme of controlled quantum teleportation is studied.Based on this,a new implementation scheme is designed.That is,based on the four-particle cluster state controllable quantum teleportation scheme,the four-particle cluster state is used as the quantum channel.After two Bell measurements and unitary transform,the stealth transmission of the unknown quantum state is probabilistically realized.Compared with the controlled quantum teleportation described in this paper,this scheme has the characteristics of high quantum channel entanglement and high information transmission security,and is easier to apply to practice.Then the quantum teleportation is studied from the perspective of quantum circuit optimization.Firstly,the general quantum gate is introduced.Then the quantum circuit model and the quantum circuit simulation representation method are studied.According to the change of quantum teleportation quantum state Regularly,an implementation line suitable for quantum teleportation in GPU simulation environment is designed.Then the quantum line optimization method is studied.Based on the quantum teleportation quantum state variation law and simulation environment,a line optimization method is proposed,which is based on the quantum teleportation optimization method under GPU environment.The quantum gate is equivalently substituted for the equation,and the proposed optimization method is used to optimize the quantum teleportation line.The number of quantum gates in the optimized quantum circuit is significantly reduced,which reduces the complexity of the line.Finally,the simulation of the quantum circuit before and after optimization is carried out in the GPU-based environment.The simulation results show that the time required for the simulation is significantly reduced,which indicates that the result of quantum teleportation optimization is achieved and the efficiency of quantum communication is improved.