Absence of species doubling in finite-element quantum electrodynamics |
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Authors: | Kimball A Milton |
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Institution: | (1) Department of Physics and Astronomy, University of Oklahoma, 73019 Norman, OK, USA |
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Abstract: | In this Letter, it will be demonstrated explicitly that the finite-element formulation of quantum electrodynamics is free from fermion doubling. We do this by (1) examining the lattice fermion propagator and using it to compute the one-loop vacuum polarization on the lattice, and (2) by an explict computation of vector and axial-vector current anomalies for an arbitrary rectangular lattice in the Schwinger model. There it is shown that requiring that the vector current be conserved necessitates the use of a square lattice, in which case the axial-vector current is anomalous. |
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Keywords: | 81T25 81T50 |
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