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In theoretical physics, quantum field theory (QFT) is a theoretical framework that combines classical field theory, special relativity, and quantum mechanics. [1] : xi QFT is used in particle physics to construct physical models of subatomic particles and in condensed matter physics to construct models of quasiparticles .
A comprehensive introduction to quantum field theory, covering classical fields, canonical quantization, Feynman diagrams, and perturbation theory. The notes include examples, exercises, and references for further reading.
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Die Quantenfeldtheorie ( QFT) ist ein Gebiet der theoretischen Physik, in dem Prinzipien klassischer Feldtheorien (zum Beispiel der klassischen Elektrodynamik) und der Quantenmechanik zur Bildung einer erweiterten Theorie kombiniert werden. Sie geht über die Quantenmechanik hinaus, indem sie Teilchen und Felder einheitlich beschreibt.
22. Juni 2006 · Quantum Field Theory (QFT) is the mathematical and conceptual framework for contemporary elementary particle physics. It is also a framework used in other areas of theoretical physics, such as condensed matter physics and statistical mechanics.
Learn about the physical principles and applications of quantum field theory, which describes the interactions of subatomic particles and force fields. Explore the examples of quantum electrodynamics, quantum chromodynamics, and gauge theories, and the quest for a unified theory.
- The Editors of Encyclopaedia Britannica
Quantum fleld theory (QFT) is a subject which has evolved considerably over the years and continues to do so. From its beginnings in elementary particle physics it has found applications in many other branches of science, in particular condensed matter physics but also as far afleld as biology and economics.
A textbook by Gordon Walter Semenoff that covers the basics of quantum field theory, functional methods, renormalization and quantum electrodynamics. Suitable for students of various fields of physics and astrophysics.
