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Scaling test of fermion actions in the Schwinger model

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arxiv hep-lat/0510047 v1 pith:6DPCY5OU submitted 2005-10-06 hep-lat

N. Christian , K. Jansen , K. Nagai , B. Pollakowski This is my paper · ORCID
classification hep-lat
keywords actionsfermionoverlapdiscussmassmodelscalingschwinger
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We discuss the scaling behaviour of different fermion actions in dynamical simulations of the 2-dimensional massive Schwinger model. We have chosen Wilson, hypercube, twisted mass and overlap fermion actions. As physical observables, the pion mass and the scalar condensate are computed for the above mentioned actions at a number of coupling values and fermion masses. We also discuss possibilities to simulate overlap fermions dynamically avoiding problems with low-lying eigenvalues of the overlap kernel.

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  1. Fermion Discretization Effects in the Two-Flavor Lattice Schwinger Model: A Study with Matrix Product States

    hep-lat 2025-09 unverdicted novelty 6.0 of 10

    Twisted mass fermions in the Hamiltonian two-flavor Schwinger model yield O(a) improvement and milder finite-volume effects once mass renormalization tunes the system to maximal twist.

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