Domain decomposition, multilevel integration, and exponential noise reduction in lattice QCD
Domain decomposition, multilevel integration, and exponential noise reduction in lattice QCD
We explore the possibility of computing fermionic correlators on the lattice by combining a domain decomposition with a multilevel integration scheme. The quark propagator is expanded in series of terms with a well-defined hierarchical structure. The higher the order of a term, the (exponentially) smaller its magnitude, the less local …