Spin Squeezing Of V-type Atom In The Cavity Field

Quantum optics is to study the coherence of the light field, quantum statistical properties of light and matter interacting quantum characteristics of the subjects. Interaction of atom and light field generated by the process more of a non-classical effects of quantum optics researchers. Effects of these non-classical theory is not only conducive to further understanding of the nature of light, but also has important practical application. In this paper, study V-type three-level atom interaction with the light field to discuss the atomic spin-compression, get some meaningful results. This is to our understanding of pressure light field and the nature of the interaction of matter and applied to quantum information, measured in the process of positive significance.This paper is divided into four chapters: Introduction prior knowledge to introduce the fundamental nature of optical squeezed state, for V-type atom Hamiltonian dynamics is derived, given the amount of atoms with spin-Hamiltonian expressions. Chapter II calculated using Fr(o|¨)hlich transformation V-atom and the role of off-resonance optical field derived atom and light field interacting Hamiltonian, the calculation of atomic master equation of atoms and light field in the form of the evolution over time. Chapter III of the three-level atomic spin compression. Chapter IV Summary and prospects.