unprec_nef_linop_array_w.h

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// -*- C++ -*-
/*! \file
 *  \brief Unpreconditioned NEF domain-wall fermion linear operator
 */
 
#ifndef __unprec_nef_linop_array_w_h__
#define __unprec_nef_linop_array_w_h__
 
#include "linearop.h"
#include "actions/ferm/linop/dslash_w.h"
#include "actions/ferm/linop/unprec_dwflike_linop_base_array_w.h"
 
 
namespace Chroma
{
  //! Unpreconditioned domain-wall Dirac operator
  /*!
   * \ingroup linop
   *
   * This routine is specific to Wilson fermions!
   */
  class UnprecNEFDWLinOpArray : public UnprecDWLikeLinOpBaseArray<LatticeFermion,
                                multi1d<LatticeColorMatrix>, multi1d<LatticeColorMatrix> >
  {
  public:
    // Typedefs to save typing
    typedef LatticeFermion               T;
    typedef multi1d<LatticeColorMatrix>  P;
    typedef multi1d<LatticeColorMatrix>  Q;
 
    //! Full constructor
    /*!
      Set b5 = 1.0 and c5=0.0 to get Shamir DWF with a5=1.
      Set b5 = 1.0 and c5=1.0 to get Borichi DWF.
    */
    UnprecNEFDWLinOpArray(Handle< FermState<T,P,Q> > fs,
                          const Real& WilsonMass_, 
                          const multi1d<Real>& b5_, const multi1d<Real>& c5_, 
                          const Real& m_q_, int N5_)
      {create(fs,WilsonMass_,b5_,c5_,m_q_,N5_);}
 
    //! Creation routine
    void create(Handle< FermState<T,P,Q> > fs,
                const Real& WilsonMass_, 
                const multi1d<Real>& b5_, const multi1d<Real>& c5_,
                const Real& m_q_, int N5_);
 
    //! Length of DW flavor index/space
    inline int size() const {return N5;}
 
    //! Destructor is automatic
    ~UnprecNEFDWLinOpArray() {}
 
    //! Return the fermion BC object for this linear operator
    const FermBC<T,P,Q>& getFermBC() const {return *fbc;}
 
    //! Only defined on the entire lattice
    const Subset& subset() const {return all;}
 
    //! Apply the operator onto a source std::vector
    void operator() (multi1d<LatticeFermion>& chi, 
                     const multi1d<LatticeFermion>& psi, 
                     enum PlusMinus isign) const;
 
    //! Apply the Dminus operator on a lattice fermion. See my notes ;-)
    void Dminus(LatticeFermion& chi,
                const LatticeFermion& psi,
                enum PlusMinus isign,
                int s5) const;
 
    //! Derivative
    void deriv(multi1d<LatticeColorMatrix>& ds_u, 
               const multi1d<LatticeFermion>& chi, const multi1d<LatticeFermion>& psi, 
               enum PlusMinus isign) const;
 
  protected:
    //! Partial constructor
    UnprecNEFDWLinOpArray() {}
    //! Hide =
    void operator=(const UnprecNEFDWLinOpArray&) {}
 
  private:
    Real WilsonMass;
    multi1d<Real> b5;
    multi1d<Real> c5;
    Real m_q;
    int  N5;
    WilsonDslash  D;
    Handle< FermBC<T,P,Q> > fbc;
 
    multi1d<Real> fb5;
    multi1d<Real> fc5;
  };
 
} // End Namespace Chroma
 
 
 
#endif