A theoretical analysis of the fundamental problem of two-level atomic systems radiatively decaying and coupled to Fock state radiation fields is presented. First, for a broad-band Fock state field and for a single two-level atom the Einstein radiation rate equation is derived within a scheme of...

Exact analytic results for the steady-state atomic correlation functions of arbitrary order n are given for a system of N superimposed two-level atoms (the Dicke model) collectively interacting with an imposed C.W. laser field. Photon statistical studies through the normalised...

An exact steady-state density operator is obtained for a model describing the collective behaviour of a system of N two-level atoms. The model yields a Fokker-Planck equation which does not satisfy detailed balance. The density operator is further employed to obtain exact analytical expressions...

The exact steady-state solution is presented for the reduced density operator for a model of N identical two-level atoms on a single site (the Dicke model) driven by a laser field with phase fluctuations. Exact expressions are given for the phase averaged atomic observables and atomic...

A fundamental investigation of the problem of an incoherently driven two-level atom is presented. In the case of a black body (thermal) broad band field the Einstein radiation rate equation is derived once a statistical decorrelation between matter and field variables is made. This is also shown...

The master equation for the reduced atomic density operator for the Dicke model (Na 2-level atoms on the same single site) interacting with a broad-band squeezed vacuum state field is derived using operator reaction field theory. The analysis through reaction field theory is presented first of...

The resonance fluorescence problem of a two-level atom in the presence of a single mode coherent field and a multimode chaotic field is investigated. The effect of interference terms of both fields as well as the non-resonant modes in the chaotic field on the dynamics of the system is considered...