fopr_Wilson_Isochemical.cpp

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#include "fopr_Wilson_Isochemical.h"

#ifdef USE_PARAMETERS_FACTORY
#include "parameters_factory.h"
#endif

using std::valarray;
using std::string;

//- parameter entries
namespace {
  void append_entry(Parameters& param)
  {
    param.Register_double("hopping_parameter", 0.0);
    param.Register_double("isospin_chemical_potential", 0.0);
    param.Register_int_vector("boundary_condition", std::valarray<int>());

    param.Register_string("verbose_level", "NULL");
  }


#ifdef USE_PARAMETERS_FACTORY
  bool init_param = ParametersFactory::Register("Fopr.Wilson_Isochemical", append_entry);
#endif
}
//- end

//- parameters class
Parameters_Fopr_Wilson_Isochemical::Parameters_Fopr_Wilson_Isochemical() { append_entry(*this); }
//- end

//====================================================================
void Fopr_Wilson_Isochemical::set_parameters(const Parameters& params)
{
  const string str_vlevel = params.get_string("verbose_level");

  m_vl = vout.set_verbose_level(str_vlevel);

  //- fetch and check input parameters
  double        kappa, mu;
  valarray<int> bc;

  int err = 0;
  err += params.fetch_double("hopping_parameter", kappa);
  err += params.fetch_double("isospin_chemical_potential", mu);
  err += params.fetch_int_vector("boundary_condition", bc);

  if (err) {
    vout.crucial(m_vl, "Fopr_Wilson_Isochemical: fetch error, input parameter not found.\n");
    abort();
  }


  set_parameters(kappa, mu, bc);
}


//====================================================================
void Fopr_Wilson_Isochemical::set_parameters(const double kappa,
                                             const double mu,
                                             const valarray<int> bc)
{
  //- print input parameters
  vout.general(m_vl, "Parameters of Fopr_Wilson_Isochemical:\n");
  vout.general(m_vl, "  kappa = %8.4f\n", kappa);
  vout.general(m_vl, "  mu    = %8.4f\n", mu);
  for (int dir = 0; dir < m_Ndim; ++dir) {
    vout.general(m_vl, "  boundary[%d] = %2d\n", dir, bc[dir]);
  }

  //- range check
  // NB. kappa,mu = 0 is allowed.
  assert(bc.size() == m_Ndim);

  //- store values
  m_kappa  = kappa;
  m_mu     = mu;
  m_exp_mu = exp(mu);

  m_boundary.resize(m_Ndim);
  for (int dir = 0; dir < m_Ndim; ++dir) {
    m_boundary[dir] = bc[dir];
  }

  //- propagate parameters
  m_fopr_w->set_parameters(kappa, bc);
}


//====================================================================
void Fopr_Wilson_Isochemical::init(string repr)
{
  m_Ndim = CommonParameters::Ndim();

  m_boundary.resize(m_Ndim);
  m_U = 0;

  m_fopr_w = new Fopr_Wilson(repr);
}


//====================================================================
void Fopr_Wilson_Isochemical::tidyup()
{
  delete m_fopr_w;
}


//====================================================================
void Fopr_Wilson_Isochemical::D(Field& w, const Field& f)
{
  int   Nvol = field_nvol();
  int   Nin  = field_nin();
  int   Nex  = field_nex();
  Field v(Nin, Nvol, Nex);

  Dspc(w, f);

  v = 0.0;
  m_fopr_w->mult_up(3, v, f);
  w.addpart_ex(0, v, 0, -m_kappa * m_exp_mu);

  v = 0.0;
  m_fopr_w->mult_dn(3, v, f);
  w.addpart_ex(0, v, 0, -m_kappa / m_exp_mu);
}


//====================================================================
void Fopr_Wilson_Isochemical::Dminmu(Field& w, const Field& f)
{
  int   Nvol = field_nvol();
  int   Nin  = field_nin();
  int   Nex  = field_nex();
  Field v(Nin, Nvol, Nex);

  Dspc(w, f);

  v = 0.0;
  m_fopr_w->mult_up(3, v, f);
  w.addpart_ex(0, v, 0, -m_kappa / m_exp_mu);

  v = 0.0;
  m_fopr_w->mult_dn(3, v, f);
  w.addpart_ex(0, v, 0, -m_kappa * m_exp_mu);
}


//====================================================================
void Fopr_Wilson_Isochemical::Dspc(Field& w, const Field& f)
{
  w = 0.0;

  m_fopr_w->mult_up(0, w, f);
  m_fopr_w->mult_dn(0, w, f);

  m_fopr_w->mult_up(1, w, f);
  m_fopr_w->mult_dn(1, w, f);

  m_fopr_w->mult_up(2, w, f);
  m_fopr_w->mult_dn(2, w, f);

  w *= -m_kappa;
  w += f;
}


//====================================================================
void Fopr_Wilson_Isochemical::mult_gm5(Field& v, const Field& f)
{
  m_fopr_w->mult_gm5(v, f);
}


//====================================================================
const Field_F Fopr_Wilson_Isochemical::mult_gm5p(int mu,
                                                 const Field_F& w)
{
  Field vt(w.nin(), w.nvol(), w.nex());

  vt = 0.0;

  m_fopr_w->mult_up(mu, vt, (Field)w);

  return (Field_F)m_fopr_w->mult_gm5(vt);
}


//====================================================================
void Fopr_Wilson_Isochemical::DdagD(Field& w, const Field& f)
{
  Field w2(f.nin(), f.nvol(), f.nex());

  D(w2, f);
  mult_gm5(w, w2);
  Dminmu(w2, w);
  mult_gm5(w, w2);
}


//====================================================================
void Fopr_Wilson_Isochemical::Ddag(Field& w, const Field& f)
{
  Field w2(f.nin(), f.nvol(), f.nex());

  mult_gm5(w, f);
  Dminmu(w2, w);
  mult_gm5(w, w2);
}


//====================================================================
void Fopr_Wilson_Isochemical::H(Field& w, const Field& f)
{
  Field w2(f.nin(), f.nvol(), f.nex());

  D(w2, f);
  mult_gm5(w, w2);
}


//====================================================================
void Fopr_Wilson_Isochemical::Hdag(Field& w, const Field& f)
{
  Field w2(f.nin(), f.nvol(), f.nex());

  Dminmu(w2, f);
  mult_gm5(w, w2);
}


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