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Testing different versions of the Laplacian

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This commit is contained in:
Guido Cossu
2017-02-13 15:38:11 +00:00
parent 08fdf05528
commit bafb101e4f
2 changed files with 92 additions and 6 deletions
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29
tests/solver/Test_laplacian.cc
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@ -50,15 +50,34 @@ int main (int argc, char ** argv)
typedef SU<Nc>::LatticeAlgebraVector AVector;
// Source and result in the algebra
AVector src(&Grid); random(pRNG,src);
AVector result(&Grid); result=zero;
AVector src_vec(&Grid); random(pRNG, src_vec);
AVector result_vec(&Grid); result_vec = zero;
LatticeColourMatrix src(&Grid);
SU<Nc>::FundamentalLieAlgebraMatrix(src_vec, src);
LatticeColourMatrix result(&Grid); result=zero;
LaplacianAdjointField<PeriodicGimplR> Laplacian(&Grid);
Laplacian.ImportGauge(Umu);
HermitianLinearOperator<LaplacianAdjointField<PeriodicGimplR>,AVector> HermOp(Laplacian);
ConjugateGradient<AVector> CG(1.0e-8,10000);
CG(HermOp,src,result);
HermitianLinearOperator<LaplacianAdjointField<PeriodicGimplR>,LatticeColourMatrix> HermOp(Laplacian);
ConjugateGradient<LatticeColourMatrix> CG(1.0e-8,10000);
CG(HermOp,src,result); // fastest
// Tests also the version using the algebra decomposition
LaplacianAlgebraField<PeriodicGimplR> LaplacianAlgebra(&Grid);
LaplacianAlgebra.ImportGauge(Umu);
HermitianLinearOperator<LaplacianAlgebraField<PeriodicGimplR>,AVector> HermOpAlg(LaplacianAlgebra);
ConjugateGradient<AVector> CG_Algebra(1.0e-8,10000);
CG_Algebra(HermOpAlg,src_vec,result_vec);
LatticeColourMatrix result2(&Grid);
SU<Nc>::FundamentalLieAlgebraMatrix(result_vec, result2);
result2 -= result;
std::cout << GridLogMessage << "Results difference " << norm2(result2) << std::endl;
Grid_finalize();
}