Almost Radial Gauge

  title={Almost Radial Gauge},
  author={Andrzej Herdegen},
  journal={Annales Henri Poincar{\'e}},
  • A. Herdegen
  • Published 5 July 2021
  • Mathematics, Physics
  • Annales Henri Poincaré
An almost radial gauge $$A^\mathrm {ar}$$ A ar of the electromagnetic potential is constructed for which $$x\cdot A^\mathrm {ar}(x)$$ x · A ar ( x ) vanishes arbitrarily fast in timelike directions. This potential is in the class introduced by Dirac with the purpose of forming gauge-invariant quantities in quantum electrodynamics. In the quantum case, the construction of smeared operators $$A^\mathrm {ar}(K)$$ A ar ( K ) is enabled by a natural… 


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