OneFlavourEvenOddRationalRatio.h

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    /*************************************************************************************
 
    Grid physics library, www.github.com/paboyle/Grid 
 
    Source file: ./lib/qcd/action/pseudofermion/OneFlavourEvenOddRationalRatio.h
 
    Copyright (C) 2015
 
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
    See the full license in the file "LICENSE" in the top level distribution directory
    *************************************************************************************/
    /*  END LEGAL */
#ifndef QCD_PSEUDOFERMION_ONE_FLAVOUR_EVEN_ODD_RATIONAL_RATIO_H
#define QCD_PSEUDOFERMION_ONE_FLAVOUR_EVEN_ODD_RATIONAL_RATIO_H
 
NAMESPACE_BEGIN(Grid);

    // One flavour rational
 
    // S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi       
    //
    // Here P/Q \sim R_{1/4}  ~ (V^dagV)^{1/4}  
    // Here N/D \sim R_{-1/2} ~ (M^dagM)^{-1/2}  
  
    template<class Impl>
    class OneFlavourEvenOddRatioRationalPseudoFermionAction : public GeneralEvenOddRatioRationalPseudoFermionAction<Impl> {
    public:
      typedef OneFlavourRationalParams Params;
    private:
      static RationalActionParams transcribe(const Params &in){
    RationalActionParams out;
    out.inv_pow = 2;
    out.lo = in.lo;
    out.hi = in.hi;
    out.MaxIter = in.MaxIter;
    out.action_tolerance = out.md_tolerance = in.tolerance;
    out.action_degree = out.md_degree = in.degree;
    out.precision = in.precision;
    out.BoundsCheckFreq = in.BoundsCheckFreq;
    return out;
      }
 
    public:
      OneFlavourEvenOddRatioRationalPseudoFermionAction(FermionOperator<Impl>  &_NumOp, 
                            FermionOperator<Impl>  &_DenOp, 
                            const Params & p
                            ) : 
    GeneralEvenOddRatioRationalPseudoFermionAction<Impl>(_NumOp, _DenOp, transcribe(p)){}
 
      virtual std::string action_name(){return "OneFlavourEvenOddRatioRationalPseudoFermionAction";}      
    };
 
    template<class Impl,class ImplF>
    class OneFlavourEvenOddRatioRationalMixedPrecPseudoFermionAction
      : public GeneralEvenOddRatioRationalMixedPrecPseudoFermionAction<Impl,ImplF> {
    public:
      typedef OneFlavourRationalParams Params;
    private:
      static RationalActionParams transcribe(const Params &in){
    RationalActionParams out;
    out.inv_pow = 2;
    out.lo = in.lo;
    out.hi = in.hi;
    out.MaxIter = in.MaxIter;
    out.action_tolerance = out.md_tolerance = in.tolerance;
    out.action_degree = out.md_degree = in.degree;
    out.precision = in.precision;
    out.BoundsCheckFreq = in.BoundsCheckFreq;
    return out;
      }
 
    public:
      OneFlavourEvenOddRatioRationalMixedPrecPseudoFermionAction(FermionOperator<Impl>  &_NumOp, 
                                 FermionOperator<Impl>  &_DenOp, 
                                 FermionOperator<ImplF>  &_NumOpF, 
                                 FermionOperator<ImplF>  &_DenOpF, 
                                 const Params & p, Integer ReliableUpdateFreq
                            ) : 
    GeneralEvenOddRatioRationalMixedPrecPseudoFermionAction<Impl,ImplF>(_NumOp, _DenOp,_NumOpF, _DenOpF, transcribe(p),ReliableUpdateFreq){}
 
      virtual std::string action_name(){return "OneFlavourEvenOddRatioRationalPseudoFermionAction";}      
    };
 
NAMESPACE_END(Grid);
 
#endif