In quantum field theory, a ghost, ghost field, ghost particle, or gauge ghost refers to an unphysical state in a gauge theory. These ghosts are introduced to maintain gauge invariance in theories where the local field components exceeds the number of physical degrees of freedom.
In quantum field theory, a ghost, ghost field, ghost particle, or gauge ghost refers to an unphysical state in a gauge theory. These ghosts are introduced to maintain gauge invariance in theories where the local field components exceeds the number of physical degrees of freedom.
Source: Wikipedia "Ghost (physics)" · CC BY-SA 4.0
Share this article: X · Bluesky