test_Spectrum_2ptFunction.cpp

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#include "test.h"

#include <sstream>

#include "gaugeConfig.h"
#include "staples.h"

#include "randomNumbers_Mseries.h"

#include "fopr.h"
#include "fprop_Standard_lex.h"

#include "director_Smear.h"
#include "fopr_Smeared.h"

#include "gammaMatrixSet.h"
#include "gaugeFixing.h"
#include "projection.h"
#include "smear.h"
#include "solver.h"
#include "source.h"

#include "corr2pt_4spinor.h"

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

namespace Test_Spectrum {
  const std::string test_name = "Spectrum.Hadron2ptFunction";

  //- test-private parameters
  namespace {
    // const std::string filename_input  = "test_Spectrum_Clover_Hadron2ptFunction.yaml";
    const std::string filename_output = "stdout";

    class Parameters_Test_Spectrum : public Parameters {
     public:
      Parameters_Test_Spectrum()
      {
        Register_string("gauge_config_status", "NULL");
        Register_string("gauge_config_type_input", "NULL");
        Register_string("config_filename_input", "NULL");

        Register_int("number_of_valence_quarks", 0);

        Register_string("verbose_level", "NULL");

        Register_double("expected_result", 0.0);
      }
    };
  }

  //- prototype declaration
  int hadron_2ptFunction(const std::string&);

  //- hadron_2ptFunction for various fermions
  int hadron_2ptFunction_Clover()
  {
    return hadron_2ptFunction("test_Spectrum_Clover_Hadron2ptFunction.yaml");
  }


  int hadron_2ptFunction_Clover_General()
  {
    return hadron_2ptFunction("test_Spectrum_Clover_General_Hadron2ptFunction.yaml");
  }


  //- NB. test_Spectrum_Wilson is implemented separately for beginners
  // int hadron_2ptFunction_Wilson() {
  //   return hadron_2ptFunction("test_Spectrum_Wilson_Hadron2ptFunction.yaml");
  // }

  int hadron_2ptFunction_Wilson_General()
  {
    return hadron_2ptFunction("test_Spectrum_Wilson_General_Hadron2ptFunction.yaml");
  }


#ifdef USE_TESTMANAGER_AUTOREGISTER
  namespace {
#if defined(USE_GROUP_SU2)
    // Nc=2 is not available.
#else
    static const bool is_registered_Clover = TestManager::RegisterTest(
      "Spectrum.Clover.Hadron2ptFunction",
      hadron_2ptFunction_Clover
      );

#if defined(USE_IMP_BGQ)
    // Imp_BGQ has not been available for Clover_General yet.
#else
    static const bool is_registered_Clover_General = TestManager::RegisterTest(
      "Spectrum.Clover_General.Hadron2ptFunction",
      hadron_2ptFunction_Clover_General
      );
#endif

    //- NB. test_Spectrum_Wilson is implemented separately for beginners
    // static const bool is_registered_Wilson = TestManager::RegisterTest(
    //   "Spectrum.Wilson.Hadron2ptFunction",
    //   hadron_2ptFunction_Wilson
    // );

#if defined(USE_IMP_BGQ)
    // Imp_BGQ has not been available for Wilson_General yet.
#else
    static const bool is_registered_Wilson_General = TestManager::RegisterTest(
      "Spectrum.Wilson_General.Hadron2ptFunction",
      hadron_2ptFunction_Wilson_General
      );
#endif
#endif
  }
#endif

  //====================================================================
  int hadron_2ptFunction(const std::string& filename_input)
  {
    // ####  parameter setup  ####
    int Nc   = CommonParameters::Nc();
    int Nd   = CommonParameters::Nd();
    int Ndim = CommonParameters::Ndim();
    int Nvol = CommonParameters::Nvol();


    unique_ptr<Parameters> params_test(new Parameters_Test_Spectrum);
    unique_ptr<Parameters> params_pre(new Parameters);

    params_pre->Register_Parameters("Test_Spectrum", params_test);

    ParameterManager::read(filename_input, params_pre);


    const int N_quark = params_test->get_int("number_of_valence_quarks");

    unique_ptr<Parameters> params_gfix(ParametersFactory::New("GaugeFixing"));
    unique_ptr<Parameters> params_proj(ParametersFactory::New("Projection"));
    unique_ptr<Parameters> params_smear(ParametersFactory::New("Smear"));
    unique_ptr<Parameters> params_dr_smear(ParametersFactory::New("Director_Smear"));
    unique_ptr<Parameters> params_solver(ParametersFactory::New("Solver"));
    unique_ptr<Parameters> params_all(new Parameters);

#ifdef USE_CPP11
    std::vector<unique_ptr<Parameters> > params_quark(N_quark);
    std::vector<unique_ptr<Parameters> > params_fopr(N_quark);
    std::vector<unique_ptr<Parameters> > params_source(N_quark);

    for (int iq = 0; iq < N_quark; ++iq) {
      params_quark[iq].reset(new Parameters);
      params_fopr[iq].reset(ParametersFactory::New("Fopr"));
      params_source[iq].reset(ParametersFactory::New("Source"));
    }
#else
    std::vector<Parameters *> params_quark(N_quark);
    std::vector<Parameters *> params_fopr(N_quark);
    std::vector<Parameters *> params_source(N_quark);

    for (int iq = 0; iq < N_quark; ++iq) {
      params_quark[iq]  = new Parameters;
      params_fopr[iq]   = ParametersFactory::New("Fopr");
      params_source[iq] = ParametersFactory::New("Source");
    }
#endif

    for (int iq = 0; iq < N_quark; ++iq) {
      params_quark[iq]->Register_Parameters("Fopr", params_fopr[iq]);
      params_quark[iq]->Register_Parameters("Source", params_source[iq]);

      std::stringstream qlabel;
      qlabel << "Quark_" << iq + 1;
      params_all->Register_Parameters(qlabel.str(), params_quark[iq]);
    }

    params_all->Register_Parameters("GaugeFixing", params_gfix);
    params_all->Register_Parameters("Projection", params_proj);
    params_all->Register_Parameters("Smear", params_smear);
    params_all->Register_Parameters("Director_Smear", params_dr_smear);
    params_all->Register_Parameters("Solver", params_solver);

    ParameterManager::read(filename_input, params_all);

    const string str_gconf_status = params_test->get_string("gauge_config_status");
    const string str_gconf_read   = params_test->get_string("gauge_config_type_input");
    const string readfile         = params_test->get_string("config_filename_input");
    const string str_vlevel       = params_test->get_string("verbose_level");

    const bool   do_check        = params_test->is_set("expected_result");
    const double expected_result = do_check ? params_test->get_double("expected_result") : 0.0;

    const string str_gfix_type   = params_gfix->get_string("gauge_fixing_type");
    const string str_proj_type   = params_proj->get_string("projection_type");
    const string str_smear_type  = params_smear->get_string("smear_type");
    const string str_solver_type = params_solver->get_string("solver_type");

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

    //- print input parameters
    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, "  vlevel       = %s\n", str_vlevel.c_str());
    vout.general(vl, "  gfix_type    = %s\n", str_gfix_type.c_str());
    vout.general(vl, "  proj_type    = %s\n", str_proj_type.c_str());
    vout.general(vl, "  smear_type   = %s\n", str_smear_type.c_str());
    vout.general(vl, "  solver_type  = %s\n", str_solver_type.c_str());

    // NB. all str_gmset_type are supposed to be the same.
    string str_gmset_type = params_fopr[0]->get_string("gamma_matrix_type");
    vout.general(vl, "  gmset_type  = %s\n", str_gmset_type.c_str());

    std::vector<std::string> str_source_type(N_quark);

    for (int iq = 0; iq < N_quark; ++iq) {
      vout.general(vl, "  Quark_%d:\n", iq + 1);

      str_source_type[iq] = params_source[iq]->get_string("source_type");
      vout.general(vl, "    source_type = %s\n", str_source_type[iq].c_str());
    }
    vout.general(vl, "\n");

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

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


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

    if (str_gconf_status == "Continue") {
      gconf_read->read_file(U, readfile);
    } else if (str_gconf_status == "Cold_start") {
      U->set_unit();
    } else if (str_gconf_status == "Hot_start") {
      int i_seed_noise = 1234567;
      unique_ptr<RandomNumbers> rand(new RandomNumbers_Mseries(i_seed_noise));
      U->set_random(rand);
    } else {
      vout.crucial(vl, "%s: unsupported gconf status \"%s\".\n", test_name.c_str(), str_gconf_status.c_str());
      exit(EXIT_FAILURE);
    }

    unique_ptr<Projection> proj(Projection::New(str_proj_type));
    unique_ptr<Smear>      smear(Smear::New(str_smear_type, proj));
    smear->set_parameters(*params_smear);

    unique_ptr<Director_Smear> dr_smear(new Director_Smear(smear));
    dr_smear->set_parameters(*params_dr_smear);
    dr_smear->set_config(U);

    int     Nsmear  = dr_smear->get_Nsmear();
    Field_G *Usmear = (Field_G *)dr_smear->getptr_smearedConfig(Nsmear);


    // ####  Gauge fixing  ####
    unique_ptr<Staples> staple(new Staples);
    unique_ptr<Field_G> Ufix(new Field_G(Nvol, Ndim));

    int ndelay = 1000;
    unique_ptr<RandomNumbers> rand(new RandomNumbers_Mseries(ndelay));

    unique_ptr<GaugeFixing> gfix(GaugeFixing::New(str_gfix_type, rand));
    gfix->set_parameters(*params_gfix);

    double plaq = staple->plaquette(*Usmear);
    vout.general(vl, "plaq(original) = %18.14f\n", plaq);

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

    double plaq2 = staple->plaquette(*Ufix);
    vout.general(vl, "plaq(fixed)    = %18.14f\n", plaq2);
    vout.general(vl, "plaq(diff)     = %18.10e\n", plaq - plaq2);


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

#ifdef USE_CPP11
    std::vector<unique_ptr<Fopr> >   fopr(N_quark);
    std::vector<unique_ptr<Solver> > solver(N_quark);
    std::vector<unique_ptr<Fprop> >  fprop_lex(N_quark);
    std::vector<unique_ptr<Source> > source(N_quark);

    for (int iq = 0; iq < N_quark; ++iq) {
      string str_fopr_type = params_fopr[iq]->get_string("fermion_type");

      fopr[iq].reset(Fopr::New(str_fopr_type, str_gmset_type));
      fopr[iq]->set_parameters(*params_fopr[iq]);
      fopr[iq]->set_config(Ufix);

      solver[iq].reset(Solver::New(str_solver_type, fopr[iq]));
      solver[iq]->set_parameters(*params_solver);

      fprop_lex[iq].reset(new Fprop_Standard_lex(solver[iq]));

      source[iq].reset(Source::New(str_source_type[iq]));
      source[iq]->set_parameters(*params_source[iq]);
    }
#else
    std::vector<Fopr *>   fopr(N_quark);
    std::vector<Solver *> solver(N_quark);
    std::vector<Fprop *>  fprop_lex(N_quark);
    std::vector<Source *> source(N_quark);

    for (int iq = 0; iq < N_quark; ++iq) {
      string str_fopr_type = params_fopr[iq]->get_string("fermion_type");

      fopr[iq] = Fopr::New(str_fopr_type, str_gmset_type);
      fopr[iq]->set_parameters(*params_fopr[iq]);
      fopr[iq]->set_config(Ufix);

      solver[iq] = Solver::New(str_solver_type, fopr[iq]);
      solver[iq]->set_parameters(*params_solver);

      fprop_lex[iq] = new Fprop_Standard_lex(solver[iq]);

      source[iq] = Source::New(str_source_type[iq]);
      source[iq]->set_parameters(*params_source[iq]);
    }
#endif

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


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

    typedef std::vector<Field_F>   PropagatorSet;

    std::vector<PropagatorSet> sq(N_quark);
    for (int iq = 0; iq < N_quark; ++iq) {
      sq[iq].resize(Nc * Nd);

      for (int i = 0; i < Nc * Nd; ++i) {
        sq[iq][i].set(0.0);
      }
    }

    Field_F b;
    b.set(0.0);

    int    Nconv;
    double diff, diff2;

    for (int iq = 0; iq < N_quark; ++iq) {
      vout.general(vl, "Solving quark propagator, flavor = %d:\n", iq + 1);
      vout.general(vl, "  color spin   Nconv      diff           diff2\n");

      for (int ispin = 0; ispin < Nd; ++ispin) {
        for (int icolor = 0; icolor < Nc; ++icolor) {
          int idx = icolor + Nc * ispin;
          source[iq]->set(b, idx);

          fprop_lex[iq]->invert_D(sq[iq][idx], b, Nconv, diff);

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

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

      vout.general(vl, "\n");
    }


    //- meson correlators
    std::ofstream log_file;
    if (filename_output != "stdout") {
      log_file.open(filename_output.c_str());
      vout.init(log_file);
    }

    vout.general(vl, "2-point correlator:\n");
    Corr2pt_4spinor     corr(gmset);
    std::vector<double> result(N_quark);

    //- case(iq_1 == iq_2)
    for (int iq = 0; iq < N_quark; ++iq) {
      vout.general(vl, "Flavor combination = %d, %d\n", iq + 1, iq + 1);
      result[iq] = corr.meson_all(sq[iq], sq[iq]);
      vout.general(vl, "\n");
    }


    //- case(iq_1 < iq_2)
    for (int iq = 0; iq < N_quark; ++iq) {
      for (int jq = iq + 1; jq < N_quark; ++jq) {
        vout.general(vl, "Flavor combination = %d, %d\n", iq + 1, jq + 1);
        double result_2 = corr.meson_all(sq[iq], sq[jq]);
        vout.general(vl, "\n");
      }
    }

    if (filename_output != "stdout") {
      log_file.close();
      vout.init(std::cout);
    }

    timer->report();

#ifdef USE_CPP11
    // do nothing
#else
    // tidy-up
    for (int iq = 0; iq < N_quark; ++iq) {
      delete params_quark[iq];
      delete params_fopr[iq];
      delete params_source[iq];

      delete fopr[iq];
      delete solver[iq];
      delete fprop_lex[iq];
      delete source[iq];
    }
#endif

    if (do_check) {
      return Test::verify(result[0], expected_result);
    } else {
      vout.detailed(vl, "check skipped: expected_result not set.\n\n");
      return EXIT_SKIP;
    }
  }
} // namespace Test_Spectrum