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This book introduces notation, terminology, and basic ideas of
relativistic quantum theories. The discussion proceeds
systematically from the principle of relativity and postulates of
quantum logics to the construction of Poincare invariant
few-particle models of interaction and scattering. It is the first
of three volumes formulating a consistent relativistic quantum
theory of interacting charged particles. Contents Quantum logic
Poincare group Quantum mechanics and relativity Observables
Elementary particles Interaction Scattering Delta function Groups
and vector spaces Group of rotations Lie groups and Lie algebras
Hilbert space Operators Subspaces and projections Representations
of groups and algebras Pseudo-orthogonal representation of Lorentz
group
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
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
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