15 citations · 20 across the 2 of their papers we have counts for
3 papers
Krylov subspace methods and the sign function: multishifts and deflation in the non-Hermitian case
Jacques C. R. Bloch, Tobias Breu, Andreas Frommer +3
Rational approximations of the matrix sign function lead to multishift methods. For non-Hermitian matrices long recurrences can cause storage problems, which can be circumvented wi…
Short-recurrence Krylov subspace methods for the overlap Dirac operator at nonzero chemical potential
Jacques C. R. Bloch, Tobias Breu, Andreas Frommer +3
The overlap operator in lattice QCD requires the computation of the sign function of a matrix, which is non-Hermitian in the presence of a quark chemical potential. In previous wor…
Comparing iterative methods to compute the overlap Dirac operator at nonzero chemical potential
Jacques Bloch, Tobias Breu, Tilo Wettig
The 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 sub…