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PauliVillars based 4D -> 5D reconstruction with Fourier Accelerated PV inverse

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by Christoph. Differs from the one by Rudy in BFM since it vectorises the twisted
4D solves in pairs.
This commit is contained in:
Peter Boyle
2018-10-11 12:35:32 +01:00
parent fe6a372f75
commit 49f25e08e8
9 changed files with 823 additions and 10 deletions
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95
Grid/qcd/action/fermion/PauliVillarsInverters.h Normal file
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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./lib/algorithms/iterative/SchurRedBlack.h
Copyright (C) 2015
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#pragma once
namespace Grid {
namespace QCD {
template<class Field>
class PauliVillarsSolverUnprec
{
public:
ConjugateGradient<Field> & CG;
PauliVillarsSolverUnprec( ConjugateGradient<Field> &_CG) : CG(_CG){};
template<class Matrix>
void operator() (Matrix &_Matrix,const Field &src,Field &sol)
{
RealD m = _Matrix.Mass();
Field A (_Matrix.FermionGrid());
MdagMLinearOperator<Matrix,Field> HermOp(_Matrix);
_Matrix.SetMass(1.0);
_Matrix.Mdag(src,A);
CG(HermOp,A,sol);
_Matrix.SetMass(m);
};
};
template<class Field,class SchurSolverType>
class PauliVillarsSolverRBprec
{
public:
SchurSolverType & SchurSolver;
PauliVillarsSolverRBprec( SchurSolverType &_SchurSolver) : SchurSolver(_SchurSolver){};
template<class Matrix>
void operator() (Matrix &_Matrix,const Field &src,Field &sol)
{
RealD m = _Matrix.Mass();
Field A (_Matrix.FermionGrid());
_Matrix.SetMass(1.0);
SchurSolver(_Matrix,src,sol);
_Matrix.SetMass(m);
};
};
template<class Field,class GaugeField>
class PauliVillarsSolverFourierAccel
{
public:
GaugeField & Umu;
ConjugateGradient<Field> & CG;
PauliVillarsSolverFourierAccel(GaugeField &_Umu,ConjugateGradient<Field> &_CG) : Umu(_Umu), CG(_CG)
{
};
template<class Matrix>
void operator() (Matrix &_Matrix,const Field &src,Field &sol)
{
FourierAcceleratedPV<Field, Matrix, typename Matrix::GaugeField > faPV(_Matrix,Umu,CG) ;
faPV.pvInv(src,sol);
};
};
}
}