The Lattice Schwinger Model: Confinement, Anomalies, Chiral Fermions and All That
In order to better understand what to expect from numerical CORE computations for two-dimensional massless QED (the Schwinger model) the authors wish to obtain some analytic control over the approach to the continuum limit for various choices of fermion derivative. To this end they study the Hamiltonian formulation of the lattice Schwinger model (i.e., the theory on the spatial lattice with continuous time) in A{sub 0} = 0 gauge. They begin with a discussion of the solution of the Hamilton equations of motion in the continuum, they then parallel the derivation of the continuum solution within the lattice framework for a range of fermion derivatives. The equations of motion for the Fourier transform of the lattice charge density operator show explicitly why it is a regulated version of this operator which corresponds to the point-split operator of the continuum theory and the sense in which the regulated lattice operator can be treated as a Bose field. The same formulas explicitly exhibit operators whose matrix elements measure the lack of approach to the continuum physics. They show that both chirality violating Wilson-type and chirality preserving SLAC-type derivatives correctly reproduce the continuum theory and show that there is a clear connection between the strong and weak coupling limits of a theory based upon a generalized SLAC-type derivative.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 763762
- Report Number(s):
- SLAC-PUB-8439; TRN: US0004799
- Resource Relation:
- Other Information: PBD: 24 Apr 2000
- Country of Publication:
- United States
- Language:
- English
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