Algebraic multigrid operators for disordered systems and lattice gauge theory
Algebraic multigrid operators for disordered systems and lattice gauge theory
The construction of multigrid operators for disordered linear lattice operators, in particular the fermion matrix in lattice gauge theories, by means of algebraic multigrid and block LU decomposition is discussed. In this formalism, the effective coarse-grid operator is obtained as the Schur complement of the original matrix. An optimal approximation …