Parameter: legrd
Definition
Number of linear grid points in [-1,1] which is used to define the Legendre polynomials.
Type
Integer
Default value
20001
Component
Only for the GARDENIA, NARCISSUS, CAMELLIA, LAVENDER, and MANJUSHAKA components.
Behavior
The Legendre orthogonal polynomials are defined in a linear grid in [-1,1]. And the number of grid points are controlled by this parameter.
Comment
Only when isort = 2 or isort = 5 this parameter is useful. See isort for more details. The 20001 is an optimal value for legrd. It is not suggested to modify it.
See also lemax for more details.
As for the applications of orthogonal polynomials in CT-QMC impurity solver, please refer to Lewin's[1] and Hartmann's[2] papers.
Reference