Cavity QED Technology In Quantum Information Processing

While it seems inevitable that physics would be affected by the availability of more and more powerful computers, which have revolutionized many areas of science, it is more surprising to find that quantum physics may influence the fields of information and computation in a new and profound way. For instance, fundamental aspects of quantum mechanics such as those entering Einstein, Podolsky, and Rosen (1935) states have found unexpected applications in information transmission and cryptography. As a new subject, the quantum information has attract more and more attentions of the people. Now, the quantum information have been used in the quantum communication, quantum dense coding, quantum teleportation and quantum computation. By using quantum two-state systems (qubits) instead of the classical bits of information, one can perform logical operations exploiting quantum interferences and taking advantage of the properties of entanglement.In the first section, we introduce fundamental acknowledge of the quantum information. Cavity QED is one of the most important technique of the quantum information. In this section, we introduce the micro wave cavity and the optical cavity. According to the different preparation method, the optical cavity can be distinguished as Fabry Perot, Whispering Gallery Modes and Photonic crystals, respectively. Then we review the generation method of the entangled atoms. Then, we give out a...