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75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/qcd/action/fermion/OverlapWilsonPartialFractionZolotarevFermion.h
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Copyright (C) 2015
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Author: Peter Boyle <pabobyle@ph.ed.ac.uk>
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef OVERLAP_WILSON_PARTFRAC_ZOLOTAREV_FERMION_H
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#define OVERLAP_WILSON_PARTFRAC_ZOLOTAREV_FERMION_H
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#include <Grid/Grid.h>
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namespace Grid {
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namespace QCD {
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template<class Impl>
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class OverlapWilsonPartialFractionZolotarevFermion : public PartialFractionFermion5D<Impl>
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{
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public:
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INHERIT_IMPL_TYPES(Impl);
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virtual void Instantiatable(void){};
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// Constructors
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OverlapWilsonPartialFractionZolotarevFermion(GaugeField &_Umu,
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GridCartesian &FiveDimGrid,
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GridRedBlackCartesian &FiveDimRedBlackGrid,
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GridCartesian &FourDimGrid,
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GridRedBlackCartesian &FourDimRedBlackGrid,
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RealD _mass,RealD _M5,
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RealD lo,RealD hi,const ImplParams &p= ImplParams()):
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// b+c=scale, b-c = 0 <=> b =c = scale/2
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PartialFractionFermion5D<Impl>(_Umu,
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FiveDimGrid,
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FiveDimRedBlackGrid,
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FourDimGrid,
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FourDimRedBlackGrid,_mass,_M5,p)
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{
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assert((this->Ls&0x1)==1); // Odd Ls required
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int nrational=this->Ls;// Odd rational order
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RealD eps = lo/hi;
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Approx::zolotarev_data *zdata = Approx::zolotarev(eps,nrational,0);
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this->SetCoefficientsZolotarev(hi,zdata);
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Approx::zolotarev_free(zdata);
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}
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};
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}
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}
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#endif
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