Electromagnetically Induced Transparency In Cavity Optomechanical System With Three Level Atomic Medium

The21st century is the age of information and network, the classical information technology sweeping across the world has brought about profound changes to human production and way of life.Humanare more eager to information technology of better secrecy performance, faster and greater development space.Quantum information science research then emerges as the time requires. Quantum information science,as an emerging field of science and technology,is mainly composed of multiple disciplines of physics and information science,based on quantum optics, quantum electrodynamics, quantum information theory, quantum electronics and oth-er disciplines as a direct theoretical basis, quantum electrodynamics, quantum information theory, quantum electronics and other disciplines as a direct theoretical basis and computer science and technology, communication science and technology, laser science and technolo-gy, electronic science and technology, atomic optics, solid state physics and semiconductor physics as the major technological basis and photon and electron as carrier of information and energy to study the quantum information generation, transmission, transmission, receiving, processing, extraction, identification, control and the best application in the related fields of science and technology and so on. Quantum state as the carrier of information,the transmis-sion of quantum information is in fact the transmission of quantum state.So how to prepare the quantum state is the core problem in quantum information. The preparation of quantum state is an important topic in quantum optics. That is to say, the development of quantum information is regarded as the prerequisite to the development of quantum optics, the two have a close relationship.The interaction of light with matter is an important topic in quantum optics. The study of field based on the quantum point can lead to some interesting phenomena,which is different from the classical case.Electromagnetically induced transparency (EIT) is one of the most typical phenomena,for which experimental and theoretical scientists’enthusiasm has never diminished.Very recently the optomechanical system draws scientists’much attention and becomes an important system of quantum optics.In this article,we study an ensemble of N identical A type three level atoms confined inside a cavity optomechanical system. We show that when the atoms have no absorption and dispersion the output field of the optomechani-cal system present transparency phenomenon.The existence of atomic medium enhances the nonlinearity of the system, which leads to the transparency window become narrower and even the appearance of two transparency windows. We also show that the frequency of the mirror oscillation affects the analogy transparency of the output cavity field.The content of this paper is divided into four chapters. In chapter1, we will sim-ply introduce the quantum theory of light including the quantization of free electromagnetic field,number state,semiclassical and quantum theory of atom-field interaction.In chapter2, we introduce some typical phenomena in quantum optics,including the coherent trapping phe-nomena of light (CT), electromagnetically induced transparency (EIT), as well as the lasing without inversion theory (LWI). In chapter3, we introduce the optomechanical system which is very hot. The first section introduces the types of the system, and in the second section we introduce the electromagnetically induced transparency theory in it. In chapter4, we study the electromagnetically induced transparency in the optomechanical system containing A type three level atom and make some related discussion.