| Recently, quantum communication is emerging disciplines which is the combination of classical information theory and quantum mechanics including quantum teleportation, quantum state sharing, quantum dense coding, quantum cryptography and so on. quantum communication is for the characteristics of transmission distance, high information capacity, and networking, etc. So the construction of high speed, large capacity of communication network, is the developing direction of the people in the future. With the reason of strong confidentiality, it reduce the complexity of the communication without environmental pollution.The preparation of quantum state is a fundamental work and the basic technology of quantum communication and quantum information processing, which has received the widespread attention. For many years, people are constantly looking for the preparation of quantum state, and a variety of solutions for the generation of quantum state proposed. In chapter ii of this article, we put forward a new scheme to prepare five particle entangled state in cavity QED. In the third chapter, we propose a new scheme to prepare particle entangled state. Our scheme, mainly through the interaction between atoms, cavity field and classical field, and controlling the interaction time and field frequency, our solution is not sensitive to cavity decay and the thermal field.In the last chapter of this article, we prepare five particle clusters state in cavity QED, and use the five particle clusters as quantum channel, realized arbitrary three-particle state secret sharing task based on cavity QED. In our secret sharing scheme, we only need single particle measurement without Bell-state and multi-particle measurement that make quantum measurement easier. We find that our solution is not sensitive to cavity decay and the thermal field. Therefore, under the condition of existing technology, the scheme which we propose can be implemented in the laboratory. |
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