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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

  • 1Lewin Boehnke, Hartmut Hafermann, Michel Ferrero, Frank Lechermann, and Olivier Parcollet, Phys. Rev. B 84, 075145 (2011).
  • 2Hartmut Hafermann, Kelly R. Patton, and Philipp Werner, Phys. Rev. B 85, 205106 (2012).