This second volume of three on relativistic quantum theories of interacting charged particles discusses quantum theories of systems with variable numbers of particles. Basics of the Fock space and quantum electrodynamics are covered with an emphasis on renormalization. In contrast to the usual treatment of the topic, particles (rather than fields) are chosen as basic ingredients.

Contents
Fock space
Scattering in Fock space
Quantum electrodynamics
Renormalization
Useful integrals
Quantum fields of fermions
Quantum field of photons
QED interaction in terms of particle operators
Relativistic invariance of QFT
Loop integrals in QED
Scattering matrix in (v/c)2 approximation
Checks of physical dimensions