mirror of https://github.com/abinit/abinit.git
37 lines
1.2 KiB
Markdown
37 lines
1.2 KiB
Markdown
---
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description: How compute the frequency-dependent susceptibility matrix, and related screened interaction matrix, and inverse dielectric marix
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authors: MG
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---
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<!--- This is the source file for this topics. Can be edited. -->
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This page gives hints on how to compute the frequency-dependent susceptibility matrix, and related screened
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interaction matrix, and inverse dielectric marix with the ABINIT package.
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## Introduction
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In the independent-particle approximation, the frequency-dependent
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susceptibility matrix, and related screened interaction matrix, and inverse
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dielectric matrix can be computed.
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This can be done on top of eigenfunctions and eigenvalues obtained from Kohn-
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Sham, generalized Kohn-Sham (e.g. hybrid functionals), as well as self-
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consistent quasiparticle methodology in the (generalized) Kohn-Sham basis.
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This is a prerequisite to many-body perturbation theory calculations, see
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[[topic:GW]] and [[topic:BSE]], to which we refer.
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The frequency meshes, used e.g. for integration along the real and imaginary
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axes, on which the susceptibility matrices (and related matrices) have to be
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computed are described in [[topic:FrequencyMeshMBPT]].
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## Related Input Variables
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{{ related_variables }}
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## Selected Input Files
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{{ selected_input_files }}
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