Schwinger model simulations with dynamical overlap fermions

Details Schwinger model simulations with dynamical overlap fermions Schwinger model simulations with dynamical overlap fermions

2007-10-04

arxiv.org/abs/0710.0997v1

PoSLAT2007:064,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, poster presented at LATTICE07 (Regensburg)

Scientific paper

We present simulation results for the 2-flavour Schwinger model with dynamical overlap fermions. In particular we apply the overlap hypercube operator at seven light fermion masses. In each case we collect sizable statistics in the topological sectors 0 and 1. Since the chiral condensate Sigma vanishes in the chiral limit, we observe densities for the microscopic Dirac spectrum, which have not been addressed yet by Random Matrix Theory (RMT). Nevertheless, by confronting the averages of the lowest eigenvalues in different topological sectors with chiral RMT in unitary ensemble we obtain -- for the very light fermion masses -- values for Sigma that follow closely the analytical predictions in the continuum.

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