Physics:Quantum field theory (QFT) basics - Revision history

Maintenance script: Normalize quantum page header order

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Maintenance script: Improve Book I intro quality

2026-05-20T09:04:49Z

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	'''field theory (QFT) basics''' ~~is a Book I topic in the Quantum Collection. Quantum~~ field theory basics: particles as excitations of fields, spacetime, Feynman diagrams, and gauge symmetries.Quantum field theory describes particles as excitations of underlying fields, combining quantum mechanics with special relativity to explain particle interactions and fundamental forces. Overview of key concepts in quantum field theory Quantum field theory basics: particles as excitations of fields, spacetime, Feynman diagrams, and gauge symmetries.Quantum field theory describes particles as excitations of underlying fields, combining quantum mechanics with special relativity to explain particle interactions and fundamental forces. In quantum field theory, particles are described as excitations of underlying fields. The creation and annihilation operators provide a mathematical framework for adding or removing particles from a system.~~</div>~~		'''field theory (QFT) basics''' quantum field theory basics: particles as excitations of fields, spacetime, Feynman diagrams, and gauge symmetries.Quantum field theory describes particles as excitations of underlying fields, combining quantum mechanics with special relativity to explain particle interactions and fundamental forces. Overview of key concepts in quantum field theory Quantum field theory basics: particles as excitations of fields, spacetime, Feynman diagrams, and gauge symmetries.Quantum field theory describes particles as excitations of underlying fields, combining quantum mechanics with special relativity to explain particle interactions and fundamental forces. In quantum field theory, particles are described as excitations of underlying fields. The creation and annihilation operators provide a mathematical framework for adding or removing particles from a system.
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Maintenance script: Clean Book I red links, intro, and image slots

2026-05-20T08:16:13Z

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Maintenance script: Normalize Book I Quantum page structure

2026-05-19T22:50:17Z

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	{{Author\|Harold Foppele}}		{{Author\|Harold Foppele}}

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	* is essential in particle physics and quantum many-body theory.		* is essential in particle physics and quantum many-body theory.

	=Propagators=		== Propagators ==

	In quantum field theory, a '''propagator''' describes the probability amplitude for a particle to travel from one spacetime point to another. It plays a central role in calculations of particle interactions and quantum processes.<ref>{{cite book \|last=Peskin \|first=Michael E. \|last2=Schroeder \|first2=Daniel V. \|title=An Introduction to Quantum Field Theory \|publisher=Westview Press \|year=1995}}</ref>		In quantum field theory, a '''propagator''' describes the probability amplitude for a particle to travel from one spacetime point to another. It plays a central role in calculations of particle interactions and quantum processes.<ref>{{cite book \|last=Peskin \|first=Michael E. \|last2=Schroeder \|first2=Daniel V. \|title=An Introduction to Quantum Field Theory \|publisher=Westview Press \|year=1995}}</ref>

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	* enable calculation of scattering amplitudes and correlation functions.		* enable calculation of scattering amplitudes and correlation functions.

	=Feynman diagrams=		== Feynman diagrams ==

	'''Feynman diagrams''' are graphical representations of interactions between particles in quantum field theory. They provide an intuitive and systematic way to calculate probability amplitudes for physical processes.<ref>{{cite book \|last=Peskin \|first=Michael E. \|last2=Schroeder \|first2=Daniel V. \|title=An Introduction to Quantum Field Theory \|publisher=Westview Press \|year=1995}}</ref>		'''Feynman diagrams''' are graphical representations of interactions between particles in quantum field theory. They provide an intuitive and systematic way to calculate probability amplitudes for physical processes.<ref>{{cite book \|last=Peskin \|first=Michael E. \|last2=Schroeder \|first2=Daniel V. \|title=An Introduction to Quantum Field Theory \|publisher=Westview Press \|year=1995}}</ref>

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	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}
	{{Quantum article nav\|previous=Physics:Quantum Trajectories\|previous label=Trajectories\|next=Physics:Quantum field theory (QFT) core\|next label=Field theory (QFT) core}}		{{Quantum article nav\|previous=Physics:Quantum Trajectories\|previous label=Trajectories\|next=Physics:Quantum field theory (QFT) core\|next label=Field theory (QFT) core}}