Integrable Models of Quantum Optics
A list of exactly solvable many-body models of quantum optics is presented. The problem of the cascade radiation spectrum of an arbitrary multilevel system, the solution to which contains tasks considered earlier as special cases, is highlighted. Examples of spectra for a three-level system, a harmonic oscillator, the Dicke model, and an equidistant system with a constant rate of spontaneous transition are given.