# Faddeev-Popov ghost

> English word · Noun

## Definitions
1. An extraneous field introduced into gauge quantum field theories to maintain the consistency of the path integral formulation.

## Etymology
Named after Ludvig Faddeev and Victor Popov.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/faddeev-popov-ghost