The Design And Correlation Analysis Of RIC Protocol

Quantum communication is a new interdisciplinary subject which combined classical information theory with quantum mechanics.It transmits information by quantum entanglement effect.Compared with classical communication,quantum communication is ab-solutely safe and moves from the national strategic level gradually to people's daily life.Based on security requirements,quantum communication has become a hot topic in the field of quan-tum physics and information science.As one of the important way of information concentration in quantum communication,quantum information concentration also has attracted much atten-tion.This paper mainly studies the related protocols of quantum information concentration in the field of quantum communication,and the safety,efficiency and noise influence analysis of some protocols.The main contents of the thesis are:Quantum information concentration based on four-qubit non-maximum entangled GHZ state.First of all,this chapter reviews the process of 1 ? 2 universal telecloning.On the basis of the above process,we study it's inverse process-quantum remote information concentra-tion.Information is previously distributed to a system of tripartite space separation.The three parties perform the joint Bell measurement and tell the restorer outcomes.The information restorer makes projection measurement or POVM to recover information.Because the channel is non-maximal entangled state,we reconstruct the initial quantum state with probabilities.In particular,the scheme is perfect when the channel is the maximum entangled state.At the same time,this part discusses the security and efficiency of the scheme and compares it with other reference in detail.Controlled remote information concentration based on five-qubit maximum entangled s-tate.we explore the reverse procedure of optimal asymmetric economical 1?3 phase co?variant telecloning-controlled remote information concentration.we chose a special five-qubit maximum entangled state as the quantum channel,which is a product state by the three-qubit GHZ state and a Bell state.Three parties in space separation perform joint Bell state measure-ment on their own qubit pairs and inform controller and rebuilder outcomes.If controller does not do anything,the whole scheme fail.If controller agrees to cooperate with rebuilder,then the plan can be completed successfully.The analysis of noise effect.Based on the controlled quantum information concentration protocol,the influence of amplitude damping and phase damping noise on the protocol is dis-cussed.Furthermore,the relationship between clone state,quantum noise and average fidelity is obtained.