| The rapid development of information makes demand for information grow increasingly. But the existing classical information system will reach its limit in the near future. Quantum informatics emerges in the situation. Quantum computer which utilizes quantum informatics has the advantages that classic computer can not match and huge potential application value, thus attracts widespread interest in the scientific community, people all over the world participate in the great subjects. By now, people have put forward various solutions to realize quantum information. Among them, the cavity quantum electrodynamics is one of the earliest proposed, most rapidly developing schemes, and its effect is one of the best. It has unique advantages compared to other systems, and is considered to be one of the most promising scheme. The goal of the research is utilizing cavity quantum electrodynamics technology to realize quantum information.This paper introduces the basic concept of quantum information and basic theory of quantum computing physical implementation, mainly depicts the cavity quantum electrodynamics system, and then introduces cavity quantum electrodynamics experiment system. On the basis above, we studied the following questions:Quantum Langevin equation is utilized to discuss the dynamical property of optical cavity optomechanical system under analytical side mechanism. The theoretical model and Hamiltonian in optical cavity optomechanical system is given. Cavity field and mechanical oscillator couping a non-linear effect induced by the radiation pressure is described, i.e. Optical multistability. Linearized quantum Langevin equation is obtained using Heisenberg equation and the fluctuation spectroscopy of the optomechanical vibration is calculation.The dynamical behavior of a microresonator in whispering-gallery cavity optomechanical system under the action of a controlling laser and a probe laser is investigated. The mechanical system is utilized to explore the transmission of the system. The origin of electromagnetically induced transparency (EIT)-like dips in the two-photon resonance is analyzed. The analog of EIT and electromagnetically induced absorption (EIA) in the output field at the probe frequency in this optomechanical system is existed. At the time, whispering-gallery cavity output detection field shows the property of A atom. The pump-probe response for the whispering-gallery mode (WGM) shares the features of the A system in atoms. Further, the switching between the EIT and EIA is dominated by the pump detune. The demonstration of EIT in this optomechanical system provides a theoretical basis for the quantum information processing. |
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