GW approximation
id:
gw-approximation-163-5720199
title:
GW approximation
text:
The GW approximation (GWA) is an approximation made in order to calculate the self-energy of a many-body system of electrons. The approximation is that the expansion of the self-energy Σ in terms of the single particle Green's function G and the screened Coulomb interaction W
- Σ = i G W − G W G W G + ⋯ can be truncated after the first term:
- Σ ≈ i G W In other words, the self-energy is expanded in a formal Taylor series in powers of the screened interaction W and the lowest order term is k
brand slug:
wiki
category slug:
encyclopedia
description:
Approximation in many-body systems
original url:
https://en.wikipedia.org/wiki/GW_approximation
date created:
2006-10-19T15:33:09Z
date modified:
2024-08-28T08:33:27Z
main entity:
{"identifier":"Q1073627","url":"https://www.wikidata.org/entity/Q1073627"}
image:
fields total:
13
integrity:
15