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279 lines
8.1 KiB
C++
279 lines
8.1 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: Chulwoo Jung <chulwoo@bnl.gov>
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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 WilsonFermionD FermionOp;
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typedef typename WilsonFermionD::FermionField FermionField;
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RealD AllZero(RealD x) { return 0.; }
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namespace Grid {
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#if 0
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template<typename Field>
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class RationalHermOp : public LinearFunction<Field> {
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public:
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using LinearFunction<Field>::operator();
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// OperatorFunction<Field> & _poly;
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LinearOperatorBase<Field> &_Linop;
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RealD _massDen, _massNum;
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FunctionHermOp(LinearOperatorBase<Field>& linop, RealD massDen,RealD massNum)
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: _Linop(linop) ,_massDen(massDen),_massNum(massNum) {};
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void operator()(const Field& in, Field& out) {
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// _poly(_Linop,in,out);
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}
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};
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#endif
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template<class Matrix,class Field>
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class InvG5LinearOperator : public LinearOperatorBase<Field> {
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Matrix &_Mat;
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RealD _num;
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RealD _Tol;
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Integer _MaxIt;
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Gamma g5;
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public:
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InvG5LinearOperator(Matrix &Mat,RealD num): _Mat(Mat),_num(num), _Tol(1e-12),_MaxIt(10000), g5(Gamma::Algebra::Gamma5) {};
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// Support for coarsening to a multigrid
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void OpDiag (const Field &in, Field &out) {
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assert(0);
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_Mat.Mdiag(in,out);
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}
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void OpDir (const Field &in, Field &out,int dir,int disp) {
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assert(0);
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_Mat.Mdir(in,out,dir,disp);
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}
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void OpDirAll (const Field &in, std::vector<Field> &out){
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assert(0);
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_Mat.MdirAll(in,out);
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};
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void Op (const Field &in, Field &out){
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assert(0);
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_Mat.M(in,out);
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}
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void AdjOp (const Field &in, Field &out){
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assert(0);
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_Mat.Mdag(in,out);
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}
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void HermOpAndNorm(const Field &in, Field &out,RealD &n1,RealD &n2){
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HermOp(in,out);
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ComplexD dot = innerProduct(in,out);
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n1=real(dot);
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n2=norm2(out);
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}
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void HermOp(const Field &in, Field &out){
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Field tmp(in.Grid());
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MdagMLinearOperator<Matrix,Field> denom(_Mat);
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ConjugateGradient<Field> CG(_Tol,_MaxIt);
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_Mat.M(in,tmp);
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tmp += _num*in;
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_Mat.Mdag(tmp,out);
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CG(denom,out,tmp);
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out = g5*tmp;
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}
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};
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struct LanczosParameters: Serializable {
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GRID_SERIALIZABLE_CLASS_MEMBERS(LanczosParameters,
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RealD, mass ,
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RealD, resid,
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RealD, ChebyLow,
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RealD, ChebyHigh,
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Integer, ChebyOrder)
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// Integer, StartTrajectory,
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// Integer, Trajectories, /* @brief Number of sweeps in this run */
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// bool, MetropolisTest,
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// Integer, NoMetropolisUntil,
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// std::string, StartingType,
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// Integer, SW,
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// RealD, Kappa,
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// IntegratorParameters, MD)
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LanczosParameters() {
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////////////////////////////// Default values
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mass = 0;
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// MetropolisTest = true;
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// NoMetropolisUntil = 10;
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// StartTrajectory = 0;
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// SW = 2;
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// Trajectories = 10;
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// StartingType = "HotStart";
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/////////////////////////////////
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}
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template <class ReaderClass >
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LanczosParameters(Reader<ReaderClass> & TheReader){
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initialize(TheReader);
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}
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template < class ReaderClass >
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void initialize(Reader<ReaderClass> &TheReader){
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// std::cout << GridLogMessage << "Reading HMC\n";
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read(TheReader, "HMC", *this);
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}
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void print_parameters() const {
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// std::cout << GridLogMessage << "[HMC parameters] Trajectories : " << Trajectories << "\n";
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// std::cout << GridLogMessage << "[HMC parameters] Start trajectory : " << StartTrajectory << "\n";
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// std::cout << GridLogMessage << "[HMC parameters] Metropolis test (on/off): " << std::boolalpha << MetropolisTest << "\n";
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// std::cout << GridLogMessage << "[HMC parameters] Thermalization trajs : " << NoMetropolisUntil << "\n";
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// std::cout << GridLogMessage << "[HMC parameters] Starting type : " << StartingType << "\n";
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// MD.print_parameters();
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}
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};
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}
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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, 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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// SU<Nc>::HotConfiguration(RNG4, Umu);
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FieldMetaData header;
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std::string file("./config");
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int precision32 = 0;
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int tworow = 0;
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// NerscIO::writeConfiguration(Umu,file,tworow,precision32);
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NerscIO::readConfiguration(Umu,header,file);
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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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int Nstop = 5;
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int Nk = 10;
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int Np = 90;
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int Nm = Nk + Np;
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int MaxIt = 10000;
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RealD resid = 1.0e-5;
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RealD mass = -1.0;
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LanczosParameters LanParams;
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#if 1
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{
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XmlReader HMCrd("LanParams.xml");
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read(HMCrd,"LanczosParameters",LanParams);
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}
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#else
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{
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LanParams.mass = mass;
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}
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#endif
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std::cout << GridLogMessage<< LanParams <<std::endl;
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{
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XmlWriter HMCwr("LanParams.xml.out");
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write(HMCwr,"LanczosParameters",LanParams);
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}
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mass=LanParams.mass;
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resid=LanParams.resid;
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while ( mass > - 5.0){
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FermionOp WilsonOperator(Umu,*FGrid,*FrbGrid,2.+mass);
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InvG5LinearOperator<FermionOp,LatticeFermion> HermOp(WilsonOperator,-2.); /// <-----
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//SchurDiagTwoOperator<FermionOp,FermionField> HermOp(WilsonOperator);
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// Gamma5HermitianLinearOperator <FermionOp,LatticeFermion> HermOp2(WilsonOperator); /// <-----
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std::vector<double> Coeffs{0, 0, 1.};
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Polynomial<FermionField> PolyX(Coeffs);
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Chebyshev<FermionField> Cheby(LanParams.ChebyLow,LanParams.ChebyHigh,LanParams.ChebyOrder);
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FunctionHermOp<FermionField> OpCheby(Cheby,HermOp);
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// InvHermOp<FermionField> Op(WilsonOperator,HermOp);
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PlainHermOp<FermionField> Op (HermOp);
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// PlainHermOp<FermionField> Op2 (HermOp2);
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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 << mass <<" : " << eval << std::endl;
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Gamma g5(Gamma::Algebra::Gamma5) ;
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ComplexD dot;
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FermionField tmp(FGrid);
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for (int i = 0; i < Nstop ; i++) {
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tmp = g5*evec[i];
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dot = innerProduct(tmp,evec[i]);
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std::cout << mass << " : " << eval[i] << " " << real(dot) << " " << imag(dot) << std::endl ;
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}
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src = evec[0]+evec[1]+evec[2];
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mass += -0.1;
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}
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Grid_finalize();
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}
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