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Results tagged with ghosts
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user 6848
Ghosts are unphysical states that arise when quantizing gauge theories. Do not use this tag for 'ghosts' in the paranormal sense.
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How to get the $i\epsilon$ prescription for a Faddeev-Popov ghost propagator?
In path integral formalism, for a physical field there will be an $i\epsilon$ term in the action, which comes from identifying the in and out vacuum, and in turn this $i\epsilon$ will naturally appear …
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