topologicalCharge.h

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#ifndef TOPOLOGICALCHARGE_INCLUDED
#define TOPOLOGICALCHARGE_INCLUDED

#include "fieldStrength.h"


#include "IO/bridgeIO.h"
using Bridge::vout;


class TopologicalCharge
{
 public:
  static const std::string class_name;

 protected:
  Bridge::VerboseLevel m_vl;

 private:
  std::string m_filename_output;

  double m_c_plaq;
  double m_c_rect;

  FieldStrength m_field_strength;


 public:
  TopologicalCharge()
    : m_vl(CommonParameters::Vlevel())
  {
    m_filename_output = "stdout";
  }

  virtual ~TopologicalCharge() {}

 private:
  // non-copyable
  TopologicalCharge(const TopologicalCharge&);
  TopologicalCharge& operator=(const TopologicalCharge&);

 public:
  virtual void set_parameters(const Parameters& params);
  void set_parameters(double c_plaq, double c_rect);

  void set_parameter_verboselevel(const Bridge::VerboseLevel vl) { m_vl = vl; }

  double measure(Field_G& U);


 private:
  double contract_epsilon_tensor(Field_G& Fmunu_1, Field_G& Fmunu_2);
};
#endif