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110 lines
3.3 KiB
C++
110 lines
3.3 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./tests/Test_dwf_lanczos.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
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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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;
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typedef WilsonFermionR FermionOp;
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typedef typename WilsonFermionR::FermionField FermionField;
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RealD AllZero(RealD x) { return 0.; }
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int main(int argc, char** argv) {
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Grid_init(&argc, &argv);
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GridCartesian* UGrid = SpaceTimeGrid::makeFourDimGrid(
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GridDefaultLatt(), GridDefaultSimd(Nd, vComplex::Nsimd()),
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GridDefaultMpi());
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GridRedBlackCartesian* UrbGrid =
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SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
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GridCartesian* FGrid = UGrid;
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GridRedBlackCartesian* FrbGrid = UrbGrid;
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printf("UGrid=%p UrbGrid=%p FGrid=%p FrbGrid=%p\n", UGrid, UrbGrid, FGrid,
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FrbGrid);
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std::vector<int> seeds4({1, 2, 3, 4});
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std::vector<int> seeds5({5, 6, 7, 8});
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GridParallelRNG RNG5(FGrid);
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RNG5.SeedFixedIntegers(seeds5);
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GridParallelRNG RNG4(UGrid);
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RNG4.SeedFixedIntegers(seeds4);
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GridParallelRNG RNG5rb(FrbGrid);
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RNG5.SeedFixedIntegers(seeds5);
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LatticeGaugeField Umu(UGrid);
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SU3::HotConfiguration(RNG4, Umu);
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/*
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std::vector<LatticeColourMatrix> U(4, UGrid);
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for (int mu = 0; mu < Nd; mu++) {
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U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
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}
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*/
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RealD mass = -0.1;
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FermionOp WilsonOperator(Umu,*FGrid,*FrbGrid,mass);
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MdagMLinearOperator<FermionOp,LatticeFermion> HermOp(WilsonOperator); /// <-----
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//SchurDiagTwoOperator<FermionOp,FermionField> HermOp(WilsonOperator);
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const int Nstop = 20;
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const int Nk = 60;
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const int Np = 60;
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const int Nm = Nk + Np;
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const int MaxIt = 10000;
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RealD resid = 1.0e-6;
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std::vector<double> Coeffs{0, 1.};
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Polynomial<FermionField> PolyX(Coeffs);
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Chebyshev<FermionField> Cheby(0.0, 10., 12);
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FunctionHermOp<FermionField> OpCheby(Cheby,HermOp);
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PlainHermOp<FermionField> Op (HermOp);
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ImplicitlyRestartedLanczos<FermionField> IRL(OpCheby, Op, Nstop, Nk, Nm, resid, MaxIt);
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std::vector<RealD> eval(Nm);
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FermionField src(FGrid);
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gaussian(RNG5, src);
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std::vector<FermionField> evec(Nm, FGrid);
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for (int i = 0; i < 1; i++) {
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std::cout << i << " / " << Nm << " grid pointer " << evec[i].Grid()
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<< std::endl;
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};
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int Nconv;
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IRL.calc(eval, evec, src, Nconv);
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std::cout << eval << std::endl;
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Grid_finalize();
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}
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