* Which problems do arise within relativistic enhancements of the
Schrodinger theory, especially if one adheres to the usual
one-particle interpretation? * To what extent can these problems be
overcome? * What is the physical necessity of quantum field
theories? In many textbooks, only insufficient answers to these
fundamental questions are provided by treating the relativistic
quantum mechanical one-particle concept very superficially and
instead introducing field quantization as soon as possible. By
contrast, this book emphasizes particularly this point of view
(relativistic quantum mechanics in the ''narrow sense''): it
extensively discusses the relativistic one-particle view and
reveals its problems and limitations, therefore illustrating the
necessity of quantized fields in a physically comprehensible way.
The first two chapters contain a detailed presentation and
comparison of the Klein-Gordon and Dirac theory, always with a view
to the non-relativistic theory. In the third chapter, we consider
relativistic scattering processes and develop the Feynman rules
from propagator techniques. This is where the indispensability of
quantum field theory reasoning becomes apparent and basic quantum
field theory concepts are introduced. This textbook addresses
undergraduate and graduate Physics students who are interested in a
clearly arranged and structured presentation of relativistic
quantum mechanics in the "narrow sense" and its connection to
quantum field theories. Each section contains a short summary and
exercises with solutions. A mathematical appendix rounds out this
excellent textbook on relativistic quantum mechanics."
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