action_F_Standard.cpp

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#include "action_F_Standard.h"

const std::string Action_F_Standard::class_name = "Action_F_Standard";

//====================================================================
void Action_F_Standard::set_parameters(const Parameters& params)
{
  Bridge::VerboseLevel vl = params.get_VerboseLevel();

  set_parameter_verboselevel(vl);
}


//====================================================================
void Action_F_Standard::set_parameters()
{
  int Nc   = CommonParameters::Nc();
  int Nvol = CommonParameters::Nvol();
  int Ndim = CommonParameters::Ndim();
  int NinG = 2 * Nc * Nc;

  vout.general(m_vl, "%s:\n", class_name.c_str());

  m_force.reset(NinG, Nvol, Ndim);

  int    Niter     = 2000;
  double Stop_cond = 1.0e-24;

  string str_solver_type = "CG";
  m_solver = Solver::New(str_solver_type, m_fopr);
  m_solver->set_parameters(Niter, Stop_cond);

  // link variable update flag
  m_status_linkv = 0;
}


//====================================================================
double Action_F_Standard::langevin(RandomNumbers *rand)
{
  int Nvol = CommonParameters::Nvol();
  int Ndim = CommonParameters::Ndim();

  int NinF     = m_fopr->field_nin();
  int NvolF    = m_fopr->field_nvol();
  int NexF     = m_fopr->field_nex();
  int size_psf = NinF * NvolF * NexF * CommonParameters::NPE();

  assert(NvolF == Nvol);
  m_psf.reset(NinF, NvolF, NexF);

  vout.general(m_vl, "  %s: %s\n", class_name.c_str(), m_label.c_str());

  Field xi(NinF, NvolF, NexF);
  rand->gauss_lex_global(xi);

  m_fopr->set_config(m_U);
  m_fopr->set_mode("Ddag");
  m_psf = m_fopr->mult(xi);

  double xi2   = xi.norm();
  double H_psf = xi2 * xi2;

  vout.general(m_vl, "    H_Fstandard  = %18.8f\n", H_psf);
  vout.general(m_vl, "    H_F/dof      = %18.8f\n", H_psf / size_psf);

  return H_psf;
}


//====================================================================
double Action_F_Standard::calcH()
{
  int Nvol = CommonParameters::Nvol();
  int Ndim = CommonParameters::Ndim();

  int NinF     = m_fopr->field_nin();
  int NvolF    = m_fopr->field_nvol();
  int NexF     = m_fopr->field_nex();
  int size_psf = NinF * NvolF * NexF * CommonParameters::NPE();

  Field v1(NinF, NvolF, NexF);

  vout.general(m_vl, "  %s: %s\n", class_name.c_str(), m_label.c_str());

  m_fopr->set_config(m_U);
  m_fopr->set_mode("DdagD");

  int    Nconv;
  double diff;
  m_solver->solve(v1, m_psf, Nconv, diff);

  vout.general(m_vl, "    Nconv = %d  diff  = %.8e\n", Nconv, diff);

  double H_psf = v1 * m_psf;

  vout.general(m_vl, "    H_Fstandard  = %18.8f\n", H_psf);
  vout.general(m_vl, "    H_F/dof      = %18.8f\n", H_psf / size_psf);

  return H_psf;
}


//====================================================================
const Field Action_F_Standard::force()
{
  if (m_status_linkv == 0) {
    int Nin  = m_U->nin();
    int Nvol = m_U->nvol();
    int Nex  = m_U->nex();
    int Nc   = CommonParameters::Nc();
    int Ndim = CommonParameters::Ndim();

    int   NinF  = m_fopr->field_nin();
    int   NvolF = m_fopr->field_nvol();
    int   NexF  = m_fopr->field_nex();
    Field eta(NinF, NvolF, NexF);

    vout.general(m_vl, "  %s: %s\n", class_name.c_str(), m_label.c_str());

    //- fermion inversion for smeared gauge field
    m_fopr->set_config(m_U);
    m_fopr->set_mode("DdagD");

    int    Nconv;
    double diff;
    m_solver->solve(eta, m_psf, Nconv, diff);

    vout.general(m_vl, "    Solver: Nconv = %6d  diff  = %12.6e\n", Nconv, diff);

    //- force of smeared fermion operator
    m_fopr_force->set_config(m_U);

    Field force(Nin, Nvol, Nex);
    Field force1(Nin, Nvol, Nex);

    force = m_fopr_force->force_core(eta);

    m_force = force;
    ++m_status_linkv;

    double Fave, Fmax, Fdev;
    m_force.stat(Fave, Fmax, Fdev);
    vout.general(m_vl, "    Fstandard_ave = %12.6f  Fstandard_max = %12.6f  Fstandard_dev = %12.6f\n",
                 Fave, Fmax, Fdev);

    return m_force;
  } else {
    vout.general(m_vl, "  %s returns previous force.\n", class_name.c_str());
    return m_force;
  }
}


//====================================================================
//============================================================END=====