Research Of Remote Preparation Based On Multi-particle Entangle State In The Quantum Network

Quantum information science is fast-growing discipline that emerged in the1980s. Inthe past20years the study of quantum information, both in theoretical innovation and inexperimental verification, has made tremendous progress. As a core part of the quantuminformation, quantum entanglement not only plays an important role in the quantuminformation theory, but also demonstrates important features of the differences betweenquantum mechanics and classical mechanics. Therefore, it has been widely used in variousfields of quantum communication as an effective resource, such as remote preparation ofquantum states, quantum secret sharing, quantum dense coding and quantum teleportation.The research on how to prepare entangled states, not only has an important scientificsignificance on understanding of quantum mechanics, but also has important practicalvalue on the development of new information processing methods.This thesis aims to study how to prepare entangled state in the quantum network,which is divided into six chapters. The third, fourth and fifth chapters are my main researchwork. In chapter3, we present the protocols on the remote preparation of multi-particleentangled states in a two-node quantum network. In chapter4, we discuss how toimplement remote preparation of n-particle entangled states in a multi-node quantumnetwork. In chapter5, we implement the remote preparation of three-particle entangledstates in quantum networks with the special w-state.