Ghost (physics)
id:
ghost-physics-161-18921776
title:
Ghost (physics)
text:
In the terminology of quantum field theory, a ghost, ghost field, ghost particle, or gauge ghost is an unphysical state in a gauge theory. Ghosts are necessary to keep gauge invariance in theories where the local fields exceed a number of physical degrees of freedom. If a given theory is self-consistent by the introduction of ghosts, these states are labeled "good". Good ghosts are virtual particles that are introduced for regularization, like Faddeev–Popov ghosts. Otherwise, "bad" ghosts admit
brand slug:
wiki
category slug:
encyclopedia
description:
Quantum field that enables consistent quantization
original url:
https://en.wikipedia.org/wiki/Ghost_(physics)
date created:
2017-01-01T11:41:20Z
date modified:
2024-08-27T13:00:31Z
main entity:
{"identifier":"Q28457887","url":"https://www.wikidata.org/entity/Q28457887"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/1/1f/Feynmann_Diagram_Gluon_Radiation.svg","width":400,"height":250}
fields total:
13
integrity:
16