Background field method
id:
background-field-method-240-5107242
title:
Background field method
text:
In theoretical physics, background field method is a useful procedure to calculate the effective action of a quantum field theory by expanding a quantum field around a classical "background" value B: After this is done, the Green's functions are evaluated as a function of the background. This approach has the advantage that the gauge invariance is manifestly preserved if the approach is applied to gauge theory.
brand slug:
wiki
category slug:
encyclopedia
description:
Technique in quantum field theory
original url:
https://en.wikipedia.org/wiki/Background_field_method
date created:
date modified:
2023-09-21T23:06:46Z
main entity:
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image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/1/1f/Feynmann_Diagram_Gluon_Radiation.svg","width":400,"height":250}
fields total:
13
integrity:
15