Physics:Quantum Propagators in quantum field theory - Revision history

WikiHarold: Restore missing Quantum reference definitions

2026-05-24T00:31:26Z

Restore missing Quantum reference definitions

← Older revision		Revision as of 00:31, 24 May 2026
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	* <math>i\epsilon</math> ensures proper boundary conditions		* <math>i\epsilon</math> ensures proper boundary conditions

	This form is widely used in calculations involving scattering amplitudes.<ref name="peskin"/>		This form is widely used in calculations involving scattering amplitudes.<ref name="peskin">Peskin, M. E.; Schroeder, D. V. ''An Introduction to Quantum Field Theory'' (1995).</ref>

	== Physical interpretation ==		== Physical interpretation ==
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	{{#invoke:PhysicsQC\|tocHeadingAndList\|Physics:Quantum basics/See also}}		{{#invoke:PhysicsQC\|tocHeadingAndList\|Physics:Quantum basics/See also}}

	==References==		= References =
	{{reflist\|3}}		{{reflist\|3}}
	{{Author\|Harold Foppele}}		{{Author\|Harold Foppele}}

	{{Sourceattribution\|Physics:Quantum Propagators in quantum field theory\|1}}		{{Sourceattribution\|Physics:Quantum Propagators in quantum field theory\|1}}

Maintenance script: Normalize quantum page header order

2026-05-22T11:33:30Z

Normalize quantum page header order

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	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}
	{{Quantum article nav\|previous=Physics:Quantum Casimir effect\|previous label=Casimir effect\|next=Physics:Quantum Feynman diagrams\|next label=Feynman diagrams}}		{{Quantum article nav\|previous=Physics:Quantum Casimir effect\|previous label=Casimir effect\|next=Physics:Quantum Feynman diagrams\|next label=Feynman diagrams}}

	<div style="display:flex; gap:24px; align-items:flex-start; max-width:1200px;">		<div style="display:flex; gap:24px; align-items:flex-start; max-width:1200px;">

Maintenance script: Clean Book label remnants and backlink spacing

2026-05-22T11:11:48Z

Clean Book label remnants and backlink spacing

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	{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}		{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}

	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}
	{{Quantum article nav\|previous=Physics:Quantum Casimir effect\|previous label=Casimir effect\|next=Physics:Quantum Feynman diagrams\|next label=Feynman diagrams}}		{{Quantum article nav\|previous=Physics:Quantum Casimir effect\|previous label=Casimir effect\|next=Physics:Quantum Feynman diagrams\|next label=Feynman diagrams}}

Maintenance script: Remove hidden BOM characters and direct Book label after Short description

2026-05-22T11:04:01Z

Remove hidden BOM characters and direct Book label after Short description

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	{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}~~Book I~~		{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}

	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}

Maintenance script: Clean Short description prefix and add Book I label

2026-05-22T10:49:04Z

Clean Short description prefix and add Book I label

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	~~~~{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}		{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}Book I

	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}

Maintenance script: Apply continuous Quantum previous-next navigation

2026-05-20T22:00:00Z

Apply continuous Quantum previous-next navigation

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	~~~~{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}		{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}

	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}
	{{Quantum article nav\|previous=Physics:Quantum ~~vacuum fluctuations~~\|previous label=~~Vacuum fluctuations~~\|next=Physics:Quantum Feynman diagrams\|next label=Feynman diagrams}}		{{Quantum article nav\|previous=Physics:Quantum Casimir effect\|previous label=Casimir effect\|next=Physics:Quantum Feynman diagrams\|next label=Feynman diagrams}}

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Maintenance script: Apply Quantum previous-next navigation

2026-05-20T12:26:05Z

Apply Quantum previous-next navigation

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	{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}		{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}

	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}
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Maintenance script: Improve Book I intro quality

2026-05-20T09:04:58Z

Improve Book I intro quality

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	{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}		{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}

	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}
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	'''Propagators in quantum field theory''' ~~is a Book I topic in the Quantum Collection. Propagators~~ in quantum field theory describe how quantum fields and their excitations propagate between different points in space-time. They are central to the calculation of physical processes, particularly in perturbation theory and Feynman diagrams. Propagation of a quantum field excitation between two space-time points Propagators in quantum field theory describe how quantum fields and their excitations propagate between different points in space-time. They are central to the calculation of physical processes, particularly in perturbation theory and Feynman diagrams. A propagator is a correlation function that gives the amplitude for a field to propagate from one point to another. For a scalar field, the time-ordered propagator is defined as: ~~D_F(x - y) = \langle 0 \| T\{\phi(x)\phi(y)\} \| 0 \rangle This function encodes how disturbances in the field travel through space-time.</div>~~		'''Propagators in quantum field theory''' propagators in quantum field theory describe how quantum fields and their excitations propagate between different points in space-time. They are central to the calculation of physical processes, particularly in perturbation theory and Feynman diagrams. Propagation of a quantum field excitation between two space-time points Propagators in quantum field theory describe how quantum fields and their excitations propagate between different points in space-time. They are central to the calculation of physical processes, particularly in perturbation theory and Feynman diagrams. A propagator is a correlation function that gives the amplitude for a field to propagate from one point to another. For a scalar field, the time-ordered propagator is defined as:
	~~</div>~~
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Maintenance script: Clean Book I red links, intro, and image slots

2026-05-20T08:16:28Z

Clean Book I red links, intro, and image slots

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	{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}		{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}

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	'''Propagators in quantum field theory''' describe how quantum fields and their excitations propagate between different points in space-time.~~<ref name="peskin">Peskin, M. E.; Schroeder, D. V. ''An Introduction to Quantum Field Theory'' (1995).</ref>~~ They are central to the calculation of physical processes, particularly in perturbation theory and Feynman diagrams.		'''Propagators in quantum field theory''' is a Book I topic in the Quantum Collection. Propagators in quantum field theory describe how quantum fields and their excitations propagate between different points in space-time. They are central to the calculation of physical processes, particularly in perturbation theory and Feynman diagrams. Propagation of a quantum field excitation between two space-time points Propagators in quantum field theory describe how quantum fields and their excitations propagate between different points in space-time. They are central to the calculation of physical processes, particularly in perturbation theory and Feynman diagrams. A propagator is a correlation function that gives the amplitude for a field to propagate from one point to another. For a scalar field, the time-ordered propagator is defined as: D_F(x - y) = \langle 0 \| T\{\phi(x)\phi(y)\} \| 0 \rangle This function encodes how disturbances in the field travel through space-time.</div>

	~~<div style="float:right; border:1px solid #ccc; padding:4px; background:#fff8dc; margin:0 0 1em 1em; width:420px;">~~
	~~<div style="font-size:90%;">~~Propagation of a quantum field excitation between two space-time points</div>
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Maintenance script: Normalize Book I Quantum page structure

2026-05-19T22:50:25Z

Normalize Book I Quantum page structure

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

	{{Sourceattribution\|Quantum field theory ~~(QFT) core~~\|1}}		{{Sourceattribution\|Physics:Quantum Propagators in quantum field theory\|1}}

← Older revision		Revision as of 11:11, 22 May 2026
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	{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}		{{Short description\|Mathematical objects describing the propagation of quantum fields and particles between space-time points}}

	{{Quantum book backlink\|Quantum field theory}}		{{Quantum book backlink\|Quantum field theory}}
	{{Quantum article nav\|previous=Physics:Quantum Casimir effect\|previous label=Casimir effect\|next=Physics:Quantum Feynman diagrams\|next label=Feynman diagrams}}		{{Quantum article nav\|previous=Physics:Quantum Casimir effect\|previous label=Casimir effect\|next=Physics:Quantum Feynman diagrams\|next label=Feynman diagrams}}