Teleportation Of An Arbitrary Two-Atom Entangled State Via Thermal Cavity

Quantum information is an interesting new subject, which is a combination of quantum mechanics and information science. Recently, quantum information has made a surprise progress both in theoretical and experimental fields. It has created many miracles which are unimaginable in classical information theory, such as absolute secure quantum key, quantum dense coding, quantum teleportation, and so on. And quantum communication is an important research field of quantum information, including quantum cryptography, quantum teleportation and quantum dense coding, etc. In this paper, the major is to present physical scheme of some quantum information--Teleportation of an Atom-Entangled State via Thermal Cavity Scheme.Cavity quantum electrodynamics (CQED) is one of the key physical systems to implement quantum computer and quantum communication network. The idea is to trap several atoms in a small high finesse optical cavity. Quantum information can be stored in the internal states of atoms. All the trapped atoms in cavity are coupled to the field, resulting in interaction among atoms. In this paper, we discuss the entanglement state and some applications of cavity QED in quantum information scheme of implementation, we discuss and explain it with six sections: Firstly, we depict the situation of the development of quantum information; In second chapter, quantum entangled state is introduced detailedly, which contains its definition, sorting, distinguishing,the application for quantum information and so on; In the third chapter, the technology of cavity is briefly reviewed; In fourth chapter, we introduce our scheme of teleportation of an arbitrary two-atom entangled state via thermal cavity, besides discuss its feasibility; In the fifth chapter, we introduce a RSP scheme of implementation, where we specify the case that the prepared states are a class of three-qubit entangled states, besides we discuss the RSP scheme when the states to be prepared are some special, calculate the successful probability and the cost of classical messages; At last, we summarize the paper and describe the prospect of future study about the quantum information.