Remote State Preparation

Quantum information is a new subject, a combination of information science and quantum mechanics, including quantum computation and quantum communication. Quantum information science shows the superiorities that classical information is not to be compared with. It has so many great potential applications that it may lead to a revolution in information domain. So quantum information has attracted more and more attentions from different fields and acquired many great progresses in both theory and experiment.Quantum entanglement is the most important factor in Quantum information. It is not only used to testify some basic quantum theories, but also play a key role in quantum information. With the quantum information developing further and further, the question of classical-communication cost in quantum-information processing is no longer can be neglected. How to accurately and economically process quantum information is a question to be solved urgently.This thesis is mainly consisted of the following aspects:1. What is the entangled state? What distinctive qualities the quantum entanglement has? How to prepare entangled state?2. We show a scheme for remote preparation of three types of multipartite pure states, general multipartite pure state and two special cases of it with the technology of C-QED.