Category:ACFDT: Difference between revisions

Revision as of 09:19, 19 March 2026

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.

Pages in category "ACFDT"

The following 17 pages are in this category, out of 17 total.

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ACFDT/RPA calculations

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RPA/ACFDT: Correlation energy in the Random Phase Approximation

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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]].