Light-Matter Coupling Regimes of the Quantum Rabi Model — Spectrum, Eigenstates, and Entanglement
In this thesis, the eigenenergies and eigenstates of the quantum Rabi model, a foundational model of light-matter interaction, are investigated. The focus lies on three different regimes characterized by the coupling strength: the weak-strong, ultrastrong, and deep-strong regime. To study the quantum Rabi model in these regimes, approximations including the rotating-wave approximation, the Scrieff
