This work discusses quantum optics and investigates the quantum properties of interactions between atoms and laser fields. It includes a concentrated discussion on the quantum properties of light fields, and deals with the quantum dynamic properties of the atoms interacting with laser fields.

Theory of the interaction between atom and radiation field: three pictures in quantum mechanics description; two-level atom and the optical Bloch equation; quantized description of the radiation field; Dicke Hamiltonian and Jaynes - Cummings model; quantum theory of a small system coupling to a "reservoir". The quantum properties of light: coherence of light; squeezed states of light; resonance fluorescence; superfluorescence; optical bistability; effects of virtual photon processes. Quantum properties of the atomic behaviour under the interaction of the radiation field: collapses and revivals of the atomic populations; squeezing effects of the atomic operators; coherent trapping of the atomic population; quantum characteristics of a two-atom system under the interaction of radiation field; autoionization of the atom in a laser field; motion of the atom in a laser field; laser cooling.