Grid/tests/sp2n/Test_hmc_Sp_Wilson2ASFermionGauge.cc

#include <Grid/Grid.h>

int main(int argc, char** argv) {
  using namespace Grid;

  typedef Representations<SpFundamentalRepresentation,
                          SpTwoIndexAntiSymmetricRepresentation>
      TheRepresentations;

  Grid_init(&argc, &argv);

  typedef GenericSp2nHMCRunnerHirep<TheRepresentations, MinimumNorm2>
      HMCWrapper;
  typedef SpWilsonTwoIndexAntiSymmetricImplR FermionImplPolicy;
  typedef SpWilsonTwoIndexAntiSymmetricFermionR FermionAction;
  typedef typename FermionAction::FermionField FermionField;

  //::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

  HMCWrapper TheHMC;

  TheHMC.Resources.AddFourDimGrid("gauge");

  // Checkpointer definition
  CheckpointerParameters CPparams;
  CPparams.config_prefix = "ckpoint_lat";
  CPparams.rng_prefix = "ckpoint_rng";
  CPparams.saveInterval = 100;
  CPparams.format = "IEEE64BIG";

  TheHMC.Resources.LoadNerscCheckpointer(CPparams);

  RNGModuleParameters RNGpar;
  RNGpar.serial_seeds = "1 2 3 4 5";
  RNGpar.parallel_seeds = "6 7 8 9 10";
  TheHMC.Resources.SetRNGSeeds(RNGpar);

  // Construct observables
  typedef PlaquetteMod<HMCWrapper::ImplPolicy> PlaqObs;
  TheHMC.Resources.AddObservable<PlaqObs>();

  RealD beta = 6.7;

  SpWilsonGaugeActionR Waction(beta);

  auto GridPtr = TheHMC.Resources.GetCartesian();
  auto GridRBPtr = TheHMC.Resources.GetRBCartesian();

  SpTwoIndexAntiSymmetricRepresentation::LatticeField U(GridPtr);
  // LatticeGaugeField U(GridPtr);

  RealD mass = -0.115;

  std::vector<Complex> boundary = {-1, -1, -1, -1};
  FermionAction::ImplParams bc(boundary);
  FermionAction FermOp(U, *GridPtr, *GridRBPtr, mass, bc);

  ConjugateGradient<FermionField> CG(1.0e-8, 2000, false);

  TwoFlavourPseudoFermionAction<FermionImplPolicy> Nf2(FermOp, CG, CG);

  Nf2.is_smeared = false;
  std::cout << GridLogMessage << "mass " << mass << std::endl;

  ActionLevel<HMCWrapper::Field, TheRepresentations> Level1(1);
  Level1.push_back(&Nf2);

  ActionLevel<HMCWrapper::Field, TheRepresentations> Level2(4);
  Level2.push_back(&Waction);

  TheHMC.TheAction.push_back(Level1);
  TheHMC.TheAction.push_back(Level2);

  TheHMC.Parameters.MD.MDsteps = 16;
  TheHMC.Parameters.MD.trajL = 1.0;

  TheHMC.ReadCommandLine(argc, argv);
  TheHMC.Run();

  if (std::string(argv[argc - 1]).compare("--assert=true") == 0) {
    // this is the pseudofermion action's value for
    // --grid 4.4.4.4 --Trajectories 1 --Thermalizations 0 --StartingType
    // ColdStart and Nc == 4 if this assertion fails, check that you have run
    // with these exact parameters
    assert(Nc == 4);
    assert(abs(Nf2.S(U) - 6586.6498) < 1.e-4);
  }

  Grid_finalize();
}