Parameter: nclean
Definition
Clean update period for quantum impurity solvers.
Type
Integer
Default value
100000 (for CT-HYB impurity solvers) or 100 (for HF-QMC impurity solver)
Component
ALL
Behavior
After a few Monte Carlo sampling steps, the numerical accuracy may be deteriorated. In order to retain the numerical accuracy, the quantum impurity solvers will conduct a clean update (in other words, recalculate everything from scratch) every nclean Monte Carlo sampling step.
Comment
nclean = 100000 (for CT-HYB) or nclean = 100 (for HF-QMC) is an optimal setting. Do not modify it casually.