unprec_hamberwu_fermact_w.h

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// -*- C++ -*-
/*! \file
 *  \brief Unpreconditioned Hamber-Wu fermion action
 */
 
#ifndef __unprec_hamberwu_fermact_w_h__
#define __unprec_hamberwu_fermact_w_h__
 
#include "unprec_wilstype_fermact_w.h"
#include "actions/ferm/linop/lgherm_w.h"
#include "io/aniso_io.h"
 
 
namespace Chroma
{
  //! Name and registration
  namespace UnprecHamberWuFermActEnv
  {
    extern const std::string name;
    bool registerAll();
  }
 
 
  //! Params for wilson ferm acts
  struct UnprecHamberWuFermActParams
  {
    UnprecHamberWuFermActParams() {}
    UnprecHamberWuFermActParams(XMLReader& in, const std::string& path);
    
    Real Mass;
    Real u0;
    AnisoParam_t anisoParam;
  };
 
 
  // Reader/writers
  void read(XMLReader& xml, const std::string& path, UnprecHamberWuFermActParams& param);
  void write(XMLWriter& xml, const std::string& path, const UnprecHamberWuFermActParams& param);
 
 
  //! Unpreconditioned HamberWu fermion action
  /*! \ingroup fermacts
   *
   * Supports creation and application for fermion actions
   */
  class UnprecHamberWuFermAct : public UnprecWilsonTypeFermAct<LatticeFermion, 
                                multi1d<LatticeColorMatrix>, multi1d<LatticeColorMatrix> >
  {
  public:
    // Typedefs to save typing
    typedef LatticeFermion               T;
    typedef multi1d<LatticeColorMatrix>  P;
    typedef multi1d<LatticeColorMatrix>  Q;
 
    //! General FermBC
    UnprecHamberWuFermAct(Handle< CreateFermState<T,P,Q> > cfs_, 
                          const UnprecHamberWuFermActParams& param_) : 
      cfs(cfs_), param(param_) {}
 
    //! Copy constructor
    UnprecHamberWuFermAct(const UnprecHamberWuFermAct& a) : 
      cfs(a.cfs), param(a.param) {}
 
    //! Produce a linear operator for this action
    UnprecLinearOperator<T,P,Q>* linOp(Handle< FermState<T,P,Q> > state) const;
 
    //! Produce the gamma_5 hermitian operator H_w
    LinearOperator<T>* hermitianLinOp(Handle< FermState<T,P,Q> > state) const 
      { 
        return new lgherm<T>(linOp(state));
      }
 
    //! Destructor is automatic
    ~UnprecHamberWuFermAct() {}
 
  protected:
    //! Return the fermion BC object for this action
    const CreateFermState<T,P,Q>& getCreateState() const {return *cfs;}
 
  private:
    UnprecHamberWuFermAct() {} //hide default constructor
    void operator=(const UnprecHamberWuFermAct& a) {} // Hide =
   
  private:
    Handle< CreateFermState<T,P,Q> >  cfs;
    UnprecHamberWuFermActParams param;
  };
 
}
 
#endif