Blind Quantum Computation And Quantum Teleportation Based On Entanglement

Quantum entanglement,as a unique physical property of quantum mechanics,has a very important role in quantum computing and quantum communication and their wide application.Quantum entangled states can be used in quantum key distribution,dense coding,quantum secret comparison,quantum computation,and quantum teleportation.It focuses on the application of quantum entanglement in blind quantum computing and quantum teleportation in this paper.In this paper,a new blind quantum computing protocol with double severs based on entanglement concentration is proposed.The entanglement concentration is used to solve the channel noise problem.The protocol includes a client and two servers.The client requires only a small amount of quantum power,which is to send quantum states and perform Pauli operations.The two servers implement an entanglement concentration scheme to remove channel noise.The probability of success in the fifth round can be approximately 80%.The two servers can communicate with each other and do not need to exchange classical information.They cannot obtain any information of input,output,and computing information from the client.This blind quantum computing protocol is safe and feasible,that is effective for solving the channel noise problem.Two quantum teleportation schemes are also proposed in this paper.One is the deterministic quantum teleportation and the other is the probabilistic quantum teleportation.The innovation of our scheme is using the four-particle entangled state to implement teleportation of the three-particle W state.The first scheme uses a four-particle maximum entangled state as the quantum channel with a probability of success is 1.The second scheme uses a general entangled state which is a four-particle non-maximally entangled state with a probability of success is4?~2(where?is the range of the four particles non-maximally entangled state).