The Influence Of Noise In The Remote State Preparation

As an important quantum resource,entanglement channel plays a vital role in quantum communication.Quantum teleportation and remote state preparation are the two most important methods of quantum communication.In this paper,we propose the protocol for the remote state preparation between two distant nodes without directly sharing entanglement state.Quantum channels are established among intermediate nodes based on Bell states.And the performance of the quantum information transmission under the noise channel is analyzed.Firstly,we investigate a protocol for remote preparation of single-qubit state with intermediate nodes by Bell states,which is applicable to the situation where various types of noise acts on the transmission system.Furthermore,we extend it to two-qubit states scenario.Finally,we analyze effect of noise on remote preparation of four-qubit cluster state via four-qubit cluster states.The results show that for the equatorial state,the fidelity of output state is related to the phase factor under the bit flip channel.In the phase flip channel,the fidelity is independent of the phase factor.In the amplitude damping channel,the fidelity is independent of the phase factor for the single qubit equatorial state;for the two qubit equatorial state,the fidelity is related to the phase factor.In addition,for a general quantum state,regardless of the noise,the fidelity is related to the amplitude information of the target state.