In this third volume of three, quantum electrodynamics is formulated in the language of physical „dressed" particles. A theory where charged particles interact via instantaneous action-at-a-distance forces is constructed - without need for renormalization. This theory describes electromagnetic phenomena in terms of directly interacting charges, but in full accord with fundamental principles of relativity and causality.

Contents
Three ways to look at QFT

Dressing

What are advantages of dressed Hamiltonian?

Coulomb potential and beyond

Decays

RQD in higher orders

Classical electrodynamics

Experimental support of RQD

Particles and relativity

Special theory of relativity

Unitary dressing transformation

Integral for decay law

Coulomb scattering integral in fourth order

Relativistic invariance of Coulomb–Darwin–Breit electrodynamics