Source-Field Approach to the Two-Level Atom in a Closed Cavity

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Abstract
The problem of the time evolution of a closed system, consisting of a two-level atom and its field in a cavity, is investigated by a quantum formalism in which the field is assumed to be a part of the atomic source and is expressible directly in terms of source variables. The source and its field form an irreducible quantum system, that is completely representable within the two-dimensional Hilbert space of the atom. The behavior of the system has features that are similar to those predicted by conventional quantum electrodynamics.