mirror of
https://github.com/paboyle/Grid.git
synced 2024-11-16 02:35:36 +00:00
101 lines
4.1 KiB
C++
101 lines
4.1 KiB
C++
/*************************************************************************************
|
|
|
|
Grid physics library, www.github.com/paboyle/Grid
|
|
|
|
Source file: ./lib/qcd/action/fermion/AbstractEOFAFermion.h
|
|
|
|
Copyright (C) 2017
|
|
|
|
Author: Peter Boyle <pabobyle@ph.ed.ac.uk>
|
|
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
|
|
Author: David Murphy <dmurphy@phys.columbia.edu>
|
|
|
|
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 GRID_QCD_ABSTRACT_EOFA_FERMION_H
|
|
#define GRID_QCD_ABSTRACT_EOFA_FERMION_H
|
|
|
|
#include <Grid/qcd/action/fermion/CayleyFermion5D.h>
|
|
|
|
namespace Grid {
|
|
namespace QCD {
|
|
|
|
// DJM: Abstract base class for EOFA fermion types.
|
|
// Defines layout of additional EOFA-specific parameters and operators.
|
|
// Use to construct EOFA pseudofermion actions that are agnostic to
|
|
// Shamir / Mobius / etc., and ensure that no one can construct EOFA
|
|
// pseudofermion action with non-EOFA fermion type.
|
|
template<class Impl>
|
|
class AbstractEOFAFermion : public CayleyFermion5D<Impl> {
|
|
public:
|
|
INHERIT_IMPL_TYPES(Impl);
|
|
|
|
public:
|
|
// Fermion operator: D(mq1) + shift*\gamma_{5}*R_{5}*\Delta_{\pm}(mq2,mq3)*P_{\pm}
|
|
RealD mq1;
|
|
RealD mq2;
|
|
RealD mq3;
|
|
RealD shift;
|
|
int pm;
|
|
|
|
RealD alpha; // Mobius scale
|
|
RealD k; // EOFA normalization constant
|
|
|
|
virtual void Instantiatable(void) = 0;
|
|
|
|
// EOFA-specific operations
|
|
// Force user to implement in derived classes
|
|
virtual void Omega (const FermionField& in, FermionField& out, int sign, int dag) = 0;
|
|
virtual void Dtilde (const FermionField& in, FermionField& out) = 0;
|
|
virtual void DtildeInv(const FermionField& in, FermionField& out) = 0;
|
|
|
|
// Implement derivatives in base class:
|
|
// for EOFA both DWF and Mobius just need d(Dw)/dU
|
|
virtual void MDeriv(GaugeField& mat, const FermionField& U, const FermionField& V, int dag){
|
|
this->DhopDeriv(mat, U, V, dag);
|
|
};
|
|
virtual void MoeDeriv(GaugeField& mat, const FermionField& U, const FermionField& V, int dag){
|
|
this->DhopDerivOE(mat, U, V, dag);
|
|
};
|
|
virtual void MeoDeriv(GaugeField& mat, const FermionField& U, const FermionField& V, int dag){
|
|
this->DhopDerivEO(mat, U, V, dag);
|
|
};
|
|
|
|
// Recompute 5D coefficients for different value of shift constant
|
|
// (needed for heatbath loop over poles)
|
|
virtual void RefreshShiftCoefficients(RealD new_shift) = 0;
|
|
|
|
// Constructors
|
|
AbstractEOFAFermion(GaugeField& _Umu, GridCartesian& FiveDimGrid, GridRedBlackCartesian& FiveDimRedBlackGrid,
|
|
GridCartesian& FourDimGrid, GridRedBlackCartesian& FourDimRedBlackGrid,
|
|
RealD _mq1, RealD _mq2, RealD _mq3, RealD _shift, int _pm,
|
|
RealD _M5, RealD _b, RealD _c, const ImplParams& p=ImplParams())
|
|
: CayleyFermion5D<Impl>(_Umu, FiveDimGrid, FiveDimRedBlackGrid, FourDimGrid, FourDimRedBlackGrid,
|
|
_mq1, _M5, p), mq1(_mq1), mq2(_mq2), mq3(_mq3), shift(_shift), pm(_pm)
|
|
{
|
|
int Ls = this->Ls;
|
|
this->alpha = _b + _c;
|
|
this->k = this->alpha * (_mq3-_mq2) * std::pow(this->alpha+1.0,2*Ls) /
|
|
( std::pow(this->alpha+1.0,Ls) + _mq2*std::pow(this->alpha-1.0,Ls) ) /
|
|
( std::pow(this->alpha+1.0,Ls) + _mq3*std::pow(this->alpha-1.0,Ls) );
|
|
};
|
|
};
|
|
}}
|
|
|
|
#endif
|