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An Introduction to Quantum Field Theory is a textbook intended for the graduate physics course covering relativistic quantum mechanics, quantum electrodynamics, and Feynman diagrams. The authors make these subjects accessible through carefully worked examples illustrating the technical aspects of the subject, and intuitive explanations of what is going on behind the mathematics.After presenting the basics of quantum electrodynamics, the authors discuss the theory of renormalization and its relation to statistical mechanics, and introduce the renormalization group. This discussion sets the stage for a discussion of the physical principles that underlie the fundamental interactions of elementary particle physics and their description by gauge field theories.

Feynman diagrams --- Gauge fields (Physics) --- Quantum field theory --- Renormalization (Physics) --- 530.19 --- 530.145 --- 530.145 Quantum theory --- Quantum theory --- 530.19 Fundamental functions in general. Potential. Gradient. Intensity. Capacity etc. --- Fundamental functions in general. Potential. Gradient. Intensity. Capacity etc. --- Charge and mass renormalization --- Mass and charge renormalization --- Electric charge and distribution --- Mass (Physics) --- Physical measurements --- Relativistic quantum field theory --- Field theory (Physics) --- Relativity (Physics) --- Fields, Gauge (Physics) --- Gage fields (Physics) --- Gauge theories (Physics) --- Group theory --- Symmetry (Physics) --- Many-body problem --- Matrices --- Fundamental functions in general. Potential. Gradient. Intensity. Capacity etc --- Quantum mechanics. Quantumfield theory --- Feynman diagrams. --- Gauge fields (Physics). --- Quantum field theory. --- Renormalization (Physics). --- Feynman, Diagrammes de --- Champs de jauge (Physique) --- Théorie quantique des champs --- Renormalisation (Physique) --- Théorie quantique des champs --- Renormalisation (physique) --- Champs de jauge (physique) --- Théorie quantique des champs. --- Feynman, Diagrammes de. --- Théorie quantique des champs.