action_F_Ratio.cpp

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#include "action_F_Ratio.h"

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

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

  set_parameter_verboselevel(vl);
}


//====================================================================
void Action_F_Ratio::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_MD = 1.0e-24;
  double Stop_cond_H  = 1.0e-24;

  string str_solver_type = "CG";
  m_solver_H_prec = Solver::New(str_solver_type, m_fopr_prec);
  m_solver_MD     = Solver::New(str_solver_type, m_fopr);
  m_solver_H      = Solver::New(str_solver_type, m_fopr);

  m_solver_H_prec->set_parameters(Niter, Stop_cond_H);
  m_solver_MD->set_parameters(Niter, Stop_cond_MD);
  m_solver_H->set_parameters(Niter, Stop_cond_H);

  //- link variable update flag
  m_status_linkv = 0;
}


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

  int NinF     = m_fopr_prec->field_nin();
  int NvolF    = m_fopr_prec->field_nvol();
  int NexF     = m_fopr_prec->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_prec->set_config(m_U);
  m_fopr->set_config(m_U);

  Field v1(NinF, NvolF, NexF), v2(NinF, NvolF, NexF);

  /*
  m_fopr->set_mode("H");
  v1 = m_fopr->mult(xi);

  int    Nconv;
  double diff;
  m_fopr_prec->set_mode("DdagD");
  m_solver_H_prec->solve(v2,v1,Nconv,diff);
  vout.general(m_vl, "    Nconv = %d  diff  = %.8e\n",Nconv,diff);

  m_fopr_prec->set_mode("H");
  m_psf = m_fopr_prec->mult(v2);
  */

  m_fopr->set_mode("H");
  v2 = m_fopr->mult_dag(xi);

  m_fopr_prec->set_mode("H");
  v1 = m_fopr_prec->mult_dag(v2);

  int    Nconv;
  double diff;
  m_fopr_prec->set_mode("DdagD");
  m_solver_H_prec->solve(m_psf, v1, Nconv, diff);
  vout.general(m_vl, "    Nconv = %d  diff  = %.8e\n", Nconv, diff);

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

  vout.general(m_vl, "    H_Fratio     = %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_Ratio::calcH()
{
  int Nvol = CommonParameters::Nvol();
  int Ndim = CommonParameters::Ndim();

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

  Field v1(NinF, NvolF, NexF), v2(NinF, NvolF, NexF);

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

  m_fopr_prec->set_config(m_U);
  m_fopr->set_config(m_U);

  m_fopr_prec->set_mode("H");
  v1 = m_fopr_prec->mult(m_psf);

  int    Nconv;
  double diff;
  m_fopr->set_mode("DdagD");
  m_solver_H->solve(v2, v1, Nconv, diff);
  vout.general(m_vl, "    Nconv = %d  diff  = %.8e\n", Nconv, diff);

  double H_psf = v1 * v2;

  vout.general(m_vl, "    H_Fratio     = %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_Ratio::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_prec->field_nin();
    int   NvolF = m_fopr_prec->field_nvol();
    int   NexF  = m_fopr_prec->field_nex();
    Field eta(NinF, NvolF, NexF);

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

    m_fopr_prec->set_config(m_U);
    m_fopr->set_config(m_U);
    m_fopr_prec_force->set_config(m_U);
    m_fopr_force->set_config(m_U);

    Field v1(NinF, NvolF, NexF), v2(NinF, NvolF, NexF);

    m_fopr_prec->set_mode("H");
    v1 = m_fopr_prec->mult(m_psf);

    int    Nconv;
    double diff;
    m_fopr->set_mode("DdagD");
    m_solver_MD->solve(v2, v1, Nconv, diff);
    vout.general(m_vl, "    Solver: Nconv = %6d  diff  = %12.6e\n", Nconv, diff);

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

    force = m_fopr_force->force_core(v2);

    m_fopr_prec_force->set_mode("H");
    force -= m_fopr_prec_force->force_core1(v2, m_psf);

    m_fopr_prec_force->set_mode("Hdag");
    force -= m_fopr_prec_force->force_core1(m_psf, v2);

    m_force = force;
    ++m_status_linkv;

    double Fave, Fmax, Fdev;
    m_force.stat(Fave, Fmax, Fdev);
    vout.general(m_vl, "    Fratio_ave = %12.6f  Fratio_max = %12.6f  Fratio_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=====