Advances In One Mode Interacting Fock Space

In the first article we study nonlinear phase changes of some quantum states with respect to a phase distribution in interacting Fock space.In the second article we discuss interaction of a single two-level atom with a single mode of interacting field in the Jaynes-Cummings model with the rotating wave approximation. The content of the third article is to passing a V-type atom through a single mode interacting field in a cavity and to arrive at a state which has been analysed to study nonclassicality of the evolved state of the system. In the process we study Mandel`s Q-parameter and normal squeezing of the resulting field.