Shifted unitary orthogonal methods for the overlap inversion

Details Shifted unitary orthogonal methods for the overlap inversion Shifted unitary orthogonal methods for the overlap inversion

2006-01-24

arxiv.org/abs/hep-lat/0601031v1

PoSLAT2005:101,2006

Physics

High Energy Physics

High Energy Physics - Lattice

6 pages, 4 figures, Lattice 2005 (Machines and algorithms)

Scientific paper

In this work we compare the convergence of the shifted unitary orthogonal method (SUOM) and different Krylov subspace solvers for propagator computations with overlap fermions. We show that the SUOM algorithm performs similarly to the shifted unitary minimal residual method (SUMR) with the latter converging slightly faster. When the geometric optimality is applied to SUOM we get e new algorithm which is faster than SUMR.

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