title: Integrability of the Rabi model.
abstract: The Rabi model is a paradigm for interacting quantum systems. It couples a bosonic mode to the smallest possible quantum model, a two-level system. I present the analytical solution which allows us to consider the question of integrability for quantum systems that do not possess a classical limit. A criterion for quantum integrability is proposed which shows that the Rabi model is integrable due to the presence of a discrete symmetry. Moreover, I introduce a generalization with no symmetries; the generalized Rabi model is the first example of a nonintegrable but exactly solvable system.
authors: EP VI and Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany.
authors: D
authors: D
authors: Braak