| The study on cavity optomechanical system has become a hot field of quantum engineering in recent years. It can be used for quantum regulating macro mechanical system, has great application value in the field of quantum communication. Atom-cavity-optomechanical system is a tripartite complex system comprised of a two-level atom placed in a cavity optomechanical system with a vibrating mirror at one end.Base on the important application of quantum entanglement and entropy squeezing in the quantum information science. Firstly, we introduce some relevant basic knowledge about entanglement and squeezing, to prepare for the next investigation. The specific work is organized as follows:Using the theory of information entropy squeezing, we investigate the entropy squeezing of a two-level atom in an atom-cavity-optomechanical system. The influence of the coherent angles of the atom, the coupling coefficient between the cavity field and the mechanical mode, and the relative phase of the two atom level on the entropy squeezing of the atom is discussed.Using the theory of quantum entanglement, we investigate the entanglement properties in the model which consists of Jaynes-Cummings model and atom-cavityoptomechanical system. The influence of the initial entanglement degree of the two atoms, the coupling coefficient between the atom and the cavity field on the bipartite and tripartite entanglement is analyzed. The entanglement transfer in the model is discussed. |
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