Remote Preparation Of Quantum Entangled State

Quantum Information is a new subject combined with Quantum Mechanics and Information Science. For its great applied potential in many fields, Quantum Information has received more and more attention.Entangled state plays a most essential role in Quantum Information. What's more, quantum teleportation and remote state preparation which are based on the entangled state determine the realization of Quantum Information Web. Although all these mentioned subjects have gained breakthrough, the pressing problem that how we can prepare remote state with a more accurate and saving way calls for solvability.This dissertation mainly includes the following works:1 Introduce the generation of three particles entangled state which uses three pairs maximally entangled state and nonmaximally entangled state. The advantage of this scheme is that it can save more classical resource.2 Based on the cavity QED techniques, we proposed a faithful scheme to prepare remote state of a single-atom state and a two-atom entangled state. This scheme has an exciting merit that only one classical bit and one single-atom state measurement is needed for the remote state preparation of multi-atom entangled state.