Faddeev–Popov ghost
Type of unphysical field in quantum field theory which provides mathematical consistency / From Wikipedia, the free encyclopedia
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This article is about a specific type of ghost field. For ghosts in the general physics sense, see Ghosts (physics).
In physics, Faddeev–Popov ghosts (also called Faddeev–Popov gauge ghosts or Faddeev–Popov ghost fields) are extraneous fields which are introduced into gauge quantum field theories to maintain the consistency of the path integral formulation. They are named after Ludvig Faddeev and Victor Popov.[1][2]
This article includes a list of general references, but it lacks sufficient corresponding inline citations. (February 2020) |
A more general meaning of the word "ghost" in theoretical physics is discussed in Ghost (physics).