Auxiliary field
id:
auxiliary-field-233-12885977
title:
Auxiliary field
text:
In physics, and especially quantum field theory, an auxiliary field is one whose equations of motion admit a single solution. Therefore, the Lagrangian describing such a field A contains an algebraic quadratic term and an arbitrary linear term, while it contains no kinetic terms: The equation of motion for A is and the Lagrangian becomes Auxiliary fields generally do not propagate, and hence the content of any theory can remain unchanged in many circumstances by adding such fields by hand.
If we
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Auxiliary_field
date created:
date modified:
2023-03-31T06:23:08Z
main entity:
{"identifier":"Q4827307","url":"https://www.wikidata.org/entity/Q4827307"}
image:
fields total:
13
integrity:
13