Testing Fermion Actions: Scaling in the Schwinger Model

Details Testing Fermion Actions: Scaling in the Schwinger Model Testing Fermion Actions: Scaling in the Schwinger Model

2005-09-29

arxiv.org/abs/hep-lat/0509174v3

PoS LAT2005 (2005) 239

Physics

High Energy Physics

High Energy Physics - Lattice

6 pages, 2 figures, talk presented at LATTICE05; changed meta data

Scientific paper

We test the scaling behaviour of Wilson, hypercube, maximally twisted mass and overlap fermion actions in dynamical simulations of the 2-dimensional massive Schwinger model. We also present possibilities to simulate overlap fermions dynamically by replacing the exact overlap operator by an approximate version. This approximation is used either as only the guidance Hamiltonian, keeping the exact overlap operator as the accept/reject Hamiltonian or for both, the guidance and accept/reject Hamiltonian in the Hybrid Monte Carlo algorithm. In the latter case we test whether the approximation error can be corrected for by computing the determinant ratio of the exact and the approximate overlap operators stochastically.

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