sample_Spectrum.cpp

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#include "bridge.h"
using Bridge::vout;


namespace {
  const std::string test_name = "sample_Spectrum";
  const std::string parameter_file_default = "sample_Spectrum_Wilson_Hadron2ptFunction.yaml";
}

//====================================================================

//====================================================================
void usage(const char *program_name)
{
  vout.general("\n\nusage: %s parameter_file\n\n", program_name);
}


//====================================================================
int hadron_2ptFunction(const Parameters& params_all)
{
  using namespace std;

  // ####  parameter setup  ####
  const int Nc   = CommonParameters::Nc();
  const int Nd   = CommonParameters::Nd();
  const int Ndim = CommonParameters::Ndim();
  const int Nvol = CommonParameters::Nvol();

  const Parameters params_spectrum = params_all.lookup("Spectrum");
  const Parameters params_gfix     = params_all.lookup("GaugeFixing");
  const Parameters params_fopr     = params_all.lookup("Fopr");
  const Parameters params_solver   = params_all.lookup("Solver");
  const Parameters params_source   = params_all.lookup("Source");

  const string        str_gconf_status = params_spectrum.get_string("gauge_config_status");
  const string        str_gconf_read   = params_spectrum.get_string("gauge_config_type_input");
  const string        readfile         = params_spectrum.get_string("config_filename_input");
  const string        str_rand_type    = params_spectrum.get_string("random_number_type");
  const unsigned long seed             = params_spectrum.get_unsigned_long("seed_for_random_number");
  const string        str_vlevel       = params_spectrum.get_string("verbose_level");

  //    const bool   do_check        = params_spectrum.is_set("expected_result");
  //    const double expected_result = do_check ? params_spectrum.get_double("expected_result") : 0.0;

  const string str_gfix_type   = params_gfix.get_string("gauge_fixing_type");
  const string str_fopr_type   = params_fopr.get_string("fermion_type");
  const string str_gmset_type  = params_fopr.get_string("gamma_matrix_type");
  const string str_solver_type = params_solver.get_string("solver_type");
  const string str_source_type = params_source.get_string("source_type");

  const Bridge::VerboseLevel vl = vout.set_verbose_level(str_vlevel);

  //- print input parameters
  vout.general(vl, "Measurement parameters\n");
  vout.general(vl, "  gconf_status = %s\n", str_gconf_status.c_str());
  vout.general(vl, "  gconf_read   = %s\n", str_gconf_read.c_str());
  vout.general(vl, "  readfile     = %s\n", readfile.c_str());
  vout.general(vl, "  rand_type    = %s\n", str_rand_type.c_str());
  vout.general(vl, "  seed         = %lu\n", seed);
  vout.general(vl, "  vlevel       = %s\n", str_vlevel.c_str());
  vout.general(vl, "  gfix_type    = %s\n", str_gfix_type.c_str());
  vout.general(vl, "  gmset_type   = %s\n", str_gmset_type.c_str());
  vout.general(vl, "  solver_type  = %s\n", str_solver_type.c_str());
  vout.general(vl, "  source_type  = %s\n", str_source_type.c_str());

  //- input parameter check
  int err = 0;
  err += ParameterCheck::non_NULL(str_gconf_status);

  if (err) {
    vout.crucial(vl, "Error at %s: input parameters have not been set\n", test_name.c_str());
    exit(EXIT_FAILURE);
  }

  if (str_solver_type == "CG") {
    vout.crucial(vl, "Error at %s: CG can not be adopted. Use CGNE,CGNR, instead.\n", test_name.c_str());
    exit(EXIT_FAILURE);
  }

  RandomNumberManager::initialize(str_rand_type, seed);


  // ####  Set up a gauge configuration  ####
  unique_ptr<Field_G> U(new Field_G(Nvol, Ndim));

  if (str_gconf_status == "Continue") {
    GaugeConfig(str_gconf_read).read(U, readfile);
  } else if (str_gconf_status == "Cold_start") {
    GaugeConfig("Unit").read(U);
  } else if (str_gconf_status == "Hot_start") {
    GaugeConfig("Random").read(U);
  } else {
    vout.crucial(vl, "Error at %s: unsupported gconf status \"%s\"\n", test_name.c_str(), str_gconf_status.c_str());
    exit(EXIT_FAILURE);
  }


  // ####  Gauge fixing  ####
  {
    unique_ptr<Field_G>           Ufix(new Field_G(Nvol, Ndim));
    const unique_ptr<GaugeFixing> gfix(GaugeFixing::New(str_gfix_type));
    gfix->set_parameters(params_gfix);

    gfix->fix(*Ufix, *U);

    copy(*U, *Ufix);
  }


  // ####  object setup  #####
  unique_ptr<GammaMatrixSet> gmset(GammaMatrixSet::New(str_gmset_type));

  unique_ptr<Fopr> fopr(Fopr::New(str_fopr_type, str_gmset_type));
  fopr->set_parameters(params_fopr);
  fopr->set_config(U);

  unique_ptr<Solver> solver(Solver::New(str_solver_type, fopr));
  solver->set_parameters(params_solver);

  const unique_ptr<Fprop> fprop_lex(new Fprop_Standard_lex(solver));

  const unique_ptr<Source> source(Source::New(str_source_type));
  source->set_parameters(params_source);

  Corr2pt_4spinor corr(gmset);
  corr.set_parameters(params_all.lookup("Corr2pt_4spinor"));

  const unique_ptr<Timer> timer(new Timer(test_name));


  // ####  Execution main part  ####
  timer->start();

  std::vector<Field_F> sq(Nc * Nd);
  for (int i_cd = 0; i_cd < Nc * Nd; ++i_cd) {
    sq[i_cd].set(0.0);
  }

  vout.general(vl, "\n");
  vout.general(vl, "Solving quark propagator:\n");
  vout.general(vl, "  color spin   Nconv      diff           diff2\n");

  for (int ispin = 0; ispin < Nd; ++ispin) {
    for (int icolor = 0; icolor < Nc; ++icolor) {
      int i_cd = icolor + Nc * ispin;

      Field_F b;    // b.set(0.0);
      source->set(b, i_cd);

      int    Nconv;
      double diff;
      fprop_lex->invert_D(sq[i_cd], b, Nconv, diff);

      Field_F y(b);
      fopr->set_mode("D");
      fopr->mult(y, sq[i_cd]);   // y  = fopr->mult(sq[i_cd]);
      axpy(y, -1.0, b);          // y -= b;
      double diff2 = y.norm2() / b.norm2();

      vout.general(vl, "   %2d   %2d   %6d   %12.4e   %12.4e\n",
                   icolor, ispin, Nconv, diff, diff2);
    }
  }

  //- meson correlators
  vout.general(vl, "\n");
  vout.general(vl, "2-point correlator:\n");

  const double result = corr.meson_all(sq, sq);

  timer->report();

  RandomNumberManager::finalize();


  //    if (do_check) {
  //      return Test::verify(result, expected_result);
  //    } else {
  //      vout.detailed(vl, "check skipped: expected_result not set.\n\n");
  //      return EXIT_SKIP;
  //    }
  return EXIT_SUCCESS;
}


//====================================================================
int main(int argc, char *argv[])
{
  bridge_initialize(&argc, &argv);

  if (argc < 2) {
    usage(argv[0]);

    bridge_finalize();
    return EXIT_FAILURE;
  }

  std::string parameter_file = std::string(argv[1]);

  Parameters params = ParameterManager::read(parameter_file);
  bridge_setup(params.lookup("Main"));

  Timer timer("Main");
  timer.start();

  hadron_2ptFunction(params);

  timer.stop();
  timer.report();

  bridge_finalize();

  return EXIT_SUCCESS;
}