Category:ACFDT: Difference between revisions
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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]]. | |||
For the | 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]]. | ||
Latest revision as of 09:21, 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.