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Quantum Field Theory (PDF 155p)
This book provides a very clear and well written introduction to Quantum Field Theory. Topics covered includes: Classical Field Theory, Free Fields, Interacting Fields, The Dirac Equation, Quantizing the Dirac Field and Quantum Electrodynamics.
Author(s): Dr David Tong
155 Pages 
Lecture Notes on Quantum Field Theory by Kevin Zhou
The contents of this notes include: Scalar Fields, Interacting Scalar Fields, Spinor Fields, Vector Fields, Quantum Electrodynamics, Amplitudes, Path Integrals in Zero Dimensions, Path Integrals in Higher Dimensions, Wilsonian Renormalization, Perturbative Renormalization, Solitons, Monopoles , Anomalies, Instantons.
Author(s): Kevin Zhou
270 Pages
Quantum Theory by James Sparks
This note describes the following topics: Classical particles and waves, Physical background and wave-particle duality, Wave mechanics, The Born interpretation, The harmonic oscillator, The mathematical structure of quantum theory, Statistical aspects of quantum theory, Angular momentum, The hydrogen atom.
Author(s): James Sparks
82 Pages
Introduction to Quantum Field Theory by Marina von Steinkirch
This book is divided into two parts. The first part is the old-school way of learning quantum field theory. The second part is dedicated to Topological Field Theories. Topics covered includes: Spin Zero, Fields with Spin, Non-Abelian Field Theories, Quantum Electrodynamics, Electroweak Theory, Quantum Chromodynamics, Renormalization, Sigma Model, Topological Field Theories.
Author(s): Marina von Steinkirch
121 Pages
Quantum Field Theory by Badis Ydri
This note covers the following topics: Free Fields, Relativistic Quantum Mechanics, Canonical Quantization of Free Field, Canonical Quantization of Interacting Fields.
Author(s): Badis Ydri
155 Pages