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StaggeredBiCGUML Class Reference

MILC staggered UML inverter (optimized bicgstab). More...

#include <fermiqcd_staggered_uml_inverter.h>

List of all members.

Static Public Member Functions

static inversion_stats inverter (staggered_field &psi_out, staggered_field &psi_in, gauge_field &U, coefficients &coeff, mdp_real absolute_precision=staggered_inversion_precision, mdp_real relative_precision=0, int max_steps=2000)


Detailed Description

MILC staggered UML inverter (optimized bicgstab).

The algorithm is taken form hep-lat/9212007 This is best algorithm for staggered fermions

It inverts mul_Q(psi_out,psi_in,U,coeff) iteratively

Parameters:
psi_out the output field passed by reference
psi_in the input field passed by reference
U the gauge field to be passed to mul_Q
coeff the gauge parameters to be passed to mul_Q
absolute_precision the target absolute precision
relative_precision the target relative precision
max_steps the maximum number of steps
Example:
    gauge_field U(lattice,nc);
    staggered_field psi(lattice,nc);
    staggered_field chi(lattice,nc);
    coefficinets coeff;
    coeff["kappa"]=1.12;
    U.load("myfield");
    psi.load("myfield_psi");
    default_staggered_inverter=StaggeredBiCGUML::inverter;
    default_staggered_action=StaggeredAsqtadActionFast::mul_Q;
    mul_invQ(chi,psi,U,coeff);
    chi.save("myfield_chi");
    


The documentation for this class was generated from the following file:
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