Ground States of Quantum Field Models

Perturbation of Embedded Eigenvalues

af Fumio Hiroshima

This book provides self-contained proofs of the existence of ground states of several interaction models in quantum field theory. We show the existence of the ground state of the Pauli-Fierz mode, the Nelson model, and the spin-boson model, and several kinds of proofs of the existence of ground states are explicitly provided.