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QED2 as a testbed for interpolations between quenched and full QCD | | W. Bardeen
; A. Duncan
; E. Eichten
; H. Thacker
; | | Date: |
3 Oct 1997 | | Journal: | Nucl.Phys.Proc.Suppl. 63 (1998) 811-813 | | Subject: | hep-lat | | Affiliation: | Fermilab), A. Duncan (Univ. of Pittsburgh), E. Eichten (Fermilab), and H. Thacker (Univ. of Virginia | | Abstract: | Lattice QED2 with the Wilson formulation of fermions is used as a convenient model system to study artifacts of the quenched approximation on a finite lattice. The quenched functional integral is shown to be ill-defined in this system as a consequence of the appearance of exactly real modes for physical values of the fermion mass. The location and frequency of such modes is studied as a function of lattice spacing, lattice volume, topological charge and improved action parameters. The efficacy of the recently proposed modified quenched approximation is examined, as well as a new approach to the interpolation from the quenched to full dynamical theory employing a truncated form of the fermion determinant. | | Source: | arXiv, hep-lat/9710020 | | Services: | Forum | Review | PDF | Favorites | |
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