Study Of Multi-particle Quantum Teleportation

Quantum information theory is a new field which produced by quantum mechanics and information science. Quantum communication is one of the content of the study. Quantum teleportation plays an essentially central role in the quantum communication. Quantum teleportation is a process that the information can be transferred from the original information. The original information is divided into classical information and quantum information and each of them respectively can be passed through classical channel and quantum channel to the recipient. The classical information is got by the measurement of the original information while the quantum information is not extracted by the sender during measurement. The recipient can resume the original state through some unitary operations after he receive these two types of the information. Based on the uncertainly principle and quantum no-cloning principle, quantum teleportation make it available for quantum secure communication. Since the first creation of quantum teleportation by Bennett, research on quantum teleportation has been attracting much attention both theory and experimental experts.In this paper, we mainly study the multi-particle quantum teleportation. Firstly we review quantum communication, quantum theoretical developments and experimental progress. After that, we describe some of theory the quantum information, the proposes and implementation process of quantum teleportation and probabilistic quantum teleportation. Chapter IV and Chapter V are the core part of this article. In the chapter IV, we improve the program of the two-particle part state quantum teleportation. Reducing the requirement of the quantum channel and avoiding Hadamard gate transformation and the introduction of the additional particles, we find a new kind of quantum state as quantum channel to achieve the two-particle part of the quantum teleportation. As a consequence, we put forward this method quantum teleportation.In the chapter V, we gives the theoretical design which uses just only one quantum channel to achieve the teleportation of an arbitrary state of three-particle. This design reduce the requirement of the quantum channel and avoid Hadamard gate transformation and the introduction of the additional particles.