Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-09-20
PoS LAT2007:141,2007
Physics
High Energy Physics
High Energy Physics - Lattice
2007 lattice proceedings, replacing acknowledgement
Scientific paper
We present a new method for reducing the stochastic noise of all-to-all propagators based on stopping the inversion of the propagator before convergence. The method is easy to implement, unbiased and independent of the quark action. Applying this method to the calculation of disconnected loops needed for hadronic structure observables we find savings in computer time of factors of 4-12 depending on the operator inserted in the loop. When combined with a hopping parameter expansion technique we obtain combined gains of up to factors of 30 for some operators.
Bali Gunnar
Collins Sara
Sch{ä}fer Andreas
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