出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present a new multigrid solver that is suitable for the Dirac operator in the presence of disordered
gauge fields. The key behind the success of the algorithm is an adaptive projection onto
the coarse grids that preserves the near null space. The resulting algorithm has weak dependence
on the gauge coupling and exhibits mild critical slowing down in the chiral limit. Results are
presented for the Wilson Dirac operator of the 2d U(1) Schwinger model.
