Comparing iterative methods to compute the overlap Dirac operator at nonzero chemical potential

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dc.creatorBloch, Jacques
dc.creatorBreu, Tobias
dc.creatorWettig, Tilo
dc.date2008-10-23
dc.date.accessioned2026-07-07T12:28:47Z
dc.date.available2026-07-07T12:28:47Z
dc.descriptionThe overlap Dirac operator at nonzero quark chemical potential involves the computation of the sign function of a non-Hermitian matrix. In this talk we present iterative Krylov subspace approximations, with deflation of critical eigenvalues, which we developed to compute the operator on large lattices. We compare the accuracy and efficiency of two alternative approximations based on the Arnoldi and on the two-sided Lanczos method. The short recurrences used in the latter method make it faster and more effective for realistic lattice simulations.
dc.description7 pages, talk presented at the XXVI International Symposium on Lattice Field Theory, July 14 - 19, 2008, Williamsburg, Virginia, USA
dc.identifierhttps://arxiv.org/abs/0810.4228
dc.identifierhttp://arxiv.org/abs/0810.4228
dc.identifierPoS LATTICE2008:027,2008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215658
dc.subjectHigh Energy Physics - Lattice
dc.titleComparing iterative methods to compute the overlap Dirac operator at nonzero chemical potential
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