Parameter: nclean

Definition

Clean update period for quantum impurity solvers.

Type

Integer

Default value

100000 (for CT-HYB impurity solvers)

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) is an optimal setting. Do not modify it casually.