Comparing iterative methods for overlap and twisted mass fermions

Details Comparing iterative methods for overlap and twisted mass fermions Comparing iterative methods for overlap and twisted mass fermions

2004-09-17

arxiv.org/abs/hep-lat/0409107v1

Physics

High Energy Physics

High Energy Physics - Lattice

Poster presented at Lattice2004(machines), Fermilab, June 21-26, 2004, 3 pages, 4 figures

Scientific paper

10.1016/j.nuclphysbps.2004.11.28

We present a systematic comparison of various iterative methods to obtain the fermion propagator with both overlap and twisted mass fermions at fixed pion mass in the quenched approximation. Taking the best available algorithm in each case we find that calculations with the overlap operator are by a factor of 20-40 more expensive than with the twisted mass operator at the parameter values considered here. For the overlap operator we also compare the efficiency of various methods for calculating the topological index.

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