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Two decades ago, Gribov copies arising in the Lorentz- or Coulomb gauge were considered problematic in non-perturbative calculations, e.g. due to potential failure of cluster decomposition (are there other reasons?)
In the meantime this bug turned into a feature, as IR properties, especially confinement seems to be related to the structure of Gribov horizons.
Can anybody explain briefly the reason behing this new turn?
In the meantime this bug turned into a feature, as IR properties, especially confinement seems to be related to the structure of Gribov horizons.
Can anybody explain briefly the reason behing this new turn?