Category:ACFDT - Revision history

Huebsch: Simplify piped link to plain lowercase link (MediaWiki first-letter case-insensitive)

2026-03-19T09:21:38Z

Simplify piped link to plain lowercase link (MediaWiki first-letter case-insensitive)

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	The adiabatic connection fluctuation-dissipation theorem (ACFDT) provides access to the correlation energy of a system. It is often used as a synonym for the random-phase approximation (RPA), which can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy. This category is part of [[~~Many-body perturbation theory\|~~many-body perturbation theory]].		The adiabatic connection fluctuation-dissipation theorem (ACFDT) provides access to the correlation energy of a system. It is often used as a synonym for the random-phase approximation (RPA), which can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy. This category is part of [[many-body perturbation theory]].

	For the theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]]. For a practical step-by-step guide, see [[ACFDT/RPA calculations]].		For the theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]]. For a practical step-by-step guide, see [[ACFDT/RPA calculations]].

Huebsch: Use sentence case for inline link display text

2026-03-19T09:19:29Z

Use sentence case for inline link display text

← Older revision		Revision as of 09:19, 19 March 2026
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	The adiabatic connection fluctuation-dissipation theorem (ACFDT) provides access to the correlation energy of a system. It is often used as a synonym for the random-phase approximation (RPA), which can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy. This category is part of [[Many-body perturbation theory]].		The adiabatic connection fluctuation-dissipation theorem (ACFDT) provides access to the correlation energy of a system. It is often used as a synonym for the random-phase approximation (RPA), which can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy. This category is part of [[Many-body perturbation theory\|many-body perturbation theory]].

	For the theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]]. For a practical step-by-step guide, see [[ACFDT/RPA calculations]].		For the theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]]. For a practical step-by-step guide, see [[ACFDT/RPA calculations]].

Huebsch: Restore ACFDT acronym definition per style guide (acronyms must be explained on category pages)

2026-03-19T09:17:40Z

Restore ACFDT acronym definition per style guide (acronyms must be explained on category pages)

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	~~RPA/~~ACFDT provides access to the correlation energy of a system. It can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy. This category is part of [[Many-body perturbation theory]].		The adiabatic connection fluctuation-dissipation theorem (ACFDT) provides access to the correlation energy of a system. It is often used as a synonym for the random-phase approximation (RPA), which can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy. This category is part of [[Many-body perturbation theory]].

	For the theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]]. For a practical step-by-step guide, see [[ACFDT/RPA calculations]].		For the theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]]. For a practical step-by-step guide, see [[ACFDT/RPA calculations]].

Huebsch: Apply style guide: merge Theory/How to into single intro; remove section headings

2026-03-19T09:12:47Z

Apply style guide: merge Theory/How to into single intro; remove section headings

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	~~== Theory ==~~		RPA/ACFDT provides access to the correlation energy of a system. It can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy. This category is part of [[Many-body perturbation theory]].
	RPA/ACFDT provides access to the correlation energy of a system. It can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy.

	For the ~~full~~ theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]].		For the theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]]. For a practical step-by-step guide, see [[ACFDT/RPA calculations]].
	~~This category is part of [[Many-body perturbation theory]].~~

	~~== How to ==~~
	A practical step-by-step guide: [[ACFDT/RPA calculations]].

Huebsch: Rewrite Theory blurb; fix TAG macro -> wikilink; fix here -> title; add parent category pointer

2026-03-19T08:47:37Z

Rewrite Theory blurb; fix TAG macro -> wikilink; fix here -> title; add parent category pointer

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	== Theory ==		== Theory ==
	~~RPA stands for the random phase approximation is often used as synonym for the adiabatic connection fluctuation dissipation theorem (ACFDT).~~ RPA/ACFDT provides access to the correlation energy of a system ~~and~~ can be understood ~~in terms of Feynman diagrams~~ as an infinite sum of all bubble diagrams, where excitonic effects ~~(interactions between electrons and holes)~~ are neglected. ~~The~~ RPA/ACFDT is used as a post-processing tool to ~~determine~~ a more accurate ~~groundstate~~ energy.		RPA/ACFDT provides access to the correlation energy of a system. It can be understood as an infinite sum of all bubble diagrams in Feynman's diagrammatic language, where excitonic effects are neglected. RPA/ACFDT is used as a post-processing tool on top of a DFT calculation to obtain a more accurate ground-state energy.

	~~The following page contains more information about~~ the ~~theory behind RPA/ACFDT:~~		For the full theoretical background, see [[RPA/ACFDT: Correlation energy in the Random Phase Approximation]].
	*{{TAG\|RPA/ACFDT: Correlation energy in the Random Phase Approximation}}.		This category is part of [[Many-body perturbation theory]].

	== How to ==		== How to ==
	A practical guide ~~to ACFDT/RPA calculations can be found on following~~ [[ACFDT/RPA calculations~~\|here~~]].		A practical step-by-step guide: [[ACFDT/RPA calculations]].

Huebsch at 10:30, 19 July 2022

2022-07-19T10:30:12Z

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	----		----

	[[Category:VASP\|ACFDT]][[Category:Many-~~Body Perturbation Theory\|Many-Body Perturbation Theory~~]]		[[Category:VASP\|ACFDT]][[Category:Many-body perturbation theory]]

Kaltakm: /* How to */

2019-07-29T15:27:51Z

How to

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	== How to ==		== How to ==
	*ACFDT~~: {{TAG\|~~ACFDT/RPA calculations}}.		A practical guide to ACFDT/RPA calculations can be found on following [[ACFDT/RPA calculations\|here]].


	----		----

	[[Category:VASP\|ACFDT]][[Category:Many-Body Perturbation Theory\|Many-Body Perturbation Theory]]		[[Category:VASP\|ACFDT]][[Category:Many-Body Perturbation Theory\|Many-Body Perturbation Theory]]

Kaltakm: /* Theory */

2019-07-29T15:25:59Z

Theory

← Older revision		Revision as of 15:25, 29 July 2019
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	RPA stands for the random phase approximation is often used as synonym for the adiabatic connection fluctuation dissipation theorem (ACFDT). RPA/ACFDT provides access to the correlation energy of a system and can be understood in terms of Feynman diagrams as an infinite sum of all bubble diagrams, where excitonic effects (interactions between electrons and holes) are neglected. The RPA/ACFDT is used as a post-processing tool to determine a more accurate groundstate energy.		RPA stands for the random phase approximation is often used as synonym for the adiabatic connection fluctuation dissipation theorem (ACFDT). RPA/ACFDT provides access to the correlation energy of a system and can be understood in terms of Feynman diagrams as an infinite sum of all bubble diagrams, where excitonic effects (interactions between electrons and holes) are neglected. The RPA/ACFDT is used as a post-processing tool to determine a more accurate groundstate energy.

	The following page contains more information about the theory behind RPA/ACFDT: {{TAG\|RPA/ACFDT: Correlation energy in the Random Phase Approximation}}.		The following page contains more information about the theory behind RPA/ACFDT:
			*{{TAG\|RPA/ACFDT: Correlation energy in the Random Phase Approximation}}.

	== How to ==		== How to ==

Kaltakm: /* Theory */

2019-07-29T15:25:50Z

Theory

← Older revision		Revision as of 15:25, 29 July 2019
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	== Theory ==		== Theory ==
	*ACFDT: {{TAG\|ACFDT~~/RPA calculations~~}}.		RPA stands for the random phase approximation is often used as synonym for the adiabatic connection fluctuation dissipation theorem (ACFDT). RPA/ACFDT provides access to the correlation energy of a system and can be understood in terms of Feynman diagrams as an infinite sum of all bubble diagrams, where excitonic effects (interactions between electrons and holes) are neglected. The RPA/ACFDT is used as a post-processing tool to determine a more accurate groundstate energy.

			The following page contains more information about the theory behind RPA/ACFDT: {{TAG\|RPA/ACFDT: Correlation energy in the Random Phase Approximation}}.

	== How to ==		== How to ==

Kaltakm: /* How to */

2019-07-25T10:43:08Z

How to

← Older revision		Revision as of 10:43, 25 July 2019
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	*ACFDT: {{TAG\|ACFDT/RPA calculations}}.		*ACFDT: {{TAG\|ACFDT/RPA calculations}}.

	*Low scaling algorithms for ACFDT/GW: {{TAG\|Low scaling ACFDT/RPA and GW algorithms}}.
	----		----

	[[Category:VASP\|ACFDT]][[Category:Many-Body Perturbation Theory\|Many-Body Perturbation Theory]]		[[Category:VASP\|ACFDT]][[Category:Many-Body Perturbation Theory\|Many-Body Perturbation Theory]]