Ground state Phase diagrams 2 Phase transitions Quantum-phase transition 2 Anisotropic quantum rabi model 1 Anisotropy 1 Bosons 1 Cerium compounds 1 Counter rotating 1 Ferromagnetic kondo lattice 1 Ferromagnetic materials 1 Ferromagnetic quantum phase transition 1 Ferromagnetism 1 Few-body quantum phase transition 1 Gap closing 1 Germanium compounds 1 Ground state properties 1 Heavy-fermion metals 1 Heisenberg models 1 Kondo lattices 1 Lattice theory 1 Light-matter interactions 1 Magnetic anisotropy 1 Metals 1 Property-based 1 Quantum optics 1 Quantum theory 1 Qubits 1 Schwinge boson 1 Schwinger boson 1