The Design Of Quantum Teleportation And Analysis With Quantum Noise

Quantum teleportation is one of the most important research contents in quan-tum information science. Quantum entanglement state pre-distribution, independent quantum source interference and pre-feedback are three key elements. The principle of quantum tele-portation is to restore the unknown quantum state of a particle on the other particle by using the entangled quantum states, in the case of the separation of the two particles. This technique achieves the transmission of quantum states with absolute security, so it has a very important position in the field of quantum information communication. Around this research direction,this paper makes three aspects of work by the mathematical tools:1.Bidirectional quantum teleportation based on hyper entanglement. It is different from the quantum contact transmission of multi degree of freedom achieved by the team of Jian-wei Pan. The communication channel is only replaced by a hyper entangled state in this paper,and the transmission of quantum state is still on the single degree of freedom. Therefore, the physical realization of the measurement and the unitary operation process is easier. In this protocol, the communication parties share a hyper entangled Bell state. With the entanglement of the two degrees of freedom, respectively, They send a single quantum state to each other.There are only two photons realizing the bidirectional transmission of quantum states. This fully reflects the advantage of the hyper entangled state as a communication channel.2.Noise analysis of quantum teleportation. In practical implementations of the teleporta-tion protocol, quantum noise is an unavoidable factor. Taking the case of two particle quan-tum teleportation, the fidelity of quantum teleportation system under the influence of noise is calculated in detail, and the relationship between quantum noise and the fidelity of quantum teleportation system is explored. The results of calculation and analysis are very important for the protocol design and channel selection of teleportation.3.Analysis of quantum controlled teleportation with quantum noise. In the quantum con-trolled teleportation, the control degree is a very important factor. On the one hand, it deter-mines whether the teleportation has effective controllability. On the other hand, it also describes the size of the control. The controlled teleportation of an arbitrary single particle based on GHZ state has effective controllability. On the basis of the scheme, the changes of the control degree are calculated and analyzed under the influence of quantum noise. The average fidelity is used to describe the control degree, and the concept of relative control is introduced. At the same time, the concept of relative control degree is introduced, and the quantitative relation between noise and control degree is discussed in detail.