fundamental.h

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/*
 *  Policy classes for the HMC
 *  Author: Guido Cossu
 */ 
 
#ifndef FUNDAMENTAL_H
#define FUNDAMENTAL_H
 
NAMESPACE_BEGIN(Grid);
 
/*
 * This is an helper class for the HMC
 * Empty since HMC updates already the fundamental representation 
 */
 
template <int ncolour, class group_name>
class FundamentalRep {
public:
  static const int Dimension = ncolour;
  static const bool isFundamental = true;
 
  // typdef to be used by the Representations class in HMC to get the
  // types for the higher representation fields
  typedef typename GaugeGroup<ncolour,group_name>::LatticeMatrix LatticeMatrix;
  typedef LatticeGaugeField LatticeField;
  
  explicit FundamentalRep(GridBase* grid) {} //do nothing
  void update_representation(const LatticeGaugeField& Uin) {} // do nothing
 
  LatticeField RtoFundamentalProject(const LatticeField& in, Real scale = 1.0) const{
    return (scale * in);
  }
 
};
 
template<class Field> 
class EmptyRep {
public:
  typedef Field LatticeField;
 
  explicit EmptyRep(GridBase* grid) {} //do nothing
  void update_representation(const LatticeField& Uin) {} // do nothing
  LatticeField RtoFundamentalProject(const LatticeField& in, Real scale = 1.0) const{}// do nothing
};
    
 
  
typedef  FundamentalRep<Nc,GroupName::SU> FundamentalRepresentation;
typedef  FundamentalRep<Nc,GroupName::Sp> SpFundamentalRepresentation;
 
NAMESPACE_END(Grid);  
 
#endif