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91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./tests/Test_wilson_cg_prec.cc
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Copyright (C) 2015
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#include <Grid/Grid.h>
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using namespace std;
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using namespace Grid;
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using namespace Grid::QCD;
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int main (int argc, char ** argv)
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{
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Grid_init(&argc,&argv);
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std::vector<int> latt_size = GridDefaultLatt();
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std::vector<int> simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
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std::vector<int> mpi_layout = GridDefaultMpi();
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GridCartesian Grid(latt_size,simd_layout,mpi_layout);
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GridRedBlackCartesian RBGrid(&Grid);
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std::vector<int> seeds({1,2,3,4,5});
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GridParallelRNG pRNG(&Grid); pRNG.SeedFixedIntegers(seeds);
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LatticeGaugeField Umu(&Grid);
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SU<Nc>::HotConfiguration(pRNG,Umu);
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double Kappa = 0.9999;
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std::cout << GridLogMessage << "Running with kappa: " << Kappa << std::endl;
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typedef SU<Nc>::LatticeAlgebraVector AVector;
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// Source and result in the algebra
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// needed for the second test
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AVector src_vec(&Grid); random(pRNG, src_vec);
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AVector result_vec(&Grid); result_vec = zero;
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LatticeColourMatrix src(&Grid);
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SU<Nc>::FundamentalLieAlgebraMatrix(src_vec, src);
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LatticeColourMatrix result(&Grid); result=zero;
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// Generate a field of adjoint matrices
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LatticeGaugeField src_f(&Grid);
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// A matrix in the adjoint
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LatticeColourMatrix src_mu(&Grid);
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for (int mu = 0; mu < Nd; mu++) {
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SU<Nc>::GaussianFundamentalLieAlgebraMatrix(pRNG, src_mu);
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PokeIndex<LorentzIndex>(src_f, timesI(src_mu), mu);
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}
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LatticeGaugeField result_f(&Grid);
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// Definition of the Laplacian operator
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ConjugateGradient<LatticeGaugeField> CG(1.0e-8,10000);
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LaplacianParams LapPar(0.00001, 1.0, 1000, 1e-8, 10, 64);
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LaplacianAdjointField<PeriodicGimplR> Laplacian(&Grid, CG, LapPar, Kappa);
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Laplacian.ImportGauge(Umu);
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std::cout << GridLogMessage << "Testing the Laplacian using the full matrix" <<std::endl;
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Laplacian.Minv(src_f, result_f);
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Laplacian.MSquareRoot(src_f);
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Grid_finalize();
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}
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