Abstract

I present recent results of simulations of lattice Quantum Chromo-Dynamics with two and three flavors of dynamical Wilson fermions on a 10 x 10 x 10 x 30 lattice. I discuss the source and nature of the systematic error in the pseudofermion method, and ways to reduce the error to an amount which is comparable or less than the expected statistical error. Finally I present some results for the improved algorithm which support the theoretical arguments for the error term estimate, and compare to the results obtained with other fermion algorithms.

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