mirror of
https://github.com/paboyle/Grid.git
synced 2024-11-14 01:35:36 +00:00
145 lines
5.0 KiB
C++
145 lines
5.0 KiB
C++
/*************************************************************************************
|
|
|
|
Grid physics library, www.github.com/paboyle/Grid
|
|
|
|
Source file: ./lib/qcd/action/pseudofermion/EvenOddSchurDifferentiable.h
|
|
|
|
Copyright (C) 2015
|
|
|
|
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
|
|
Author: Guido Cossu <guido.cossu@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_EVEN_ODD_SCHUR_DIFFERENTIABLE_H
|
|
#define QCD_EVEN_ODD_SCHUR_DIFFERENTIABLE_H
|
|
|
|
NAMESPACE_BEGIN(Grid);
|
|
|
|
// Base even odd HMC on the normal Mee based schur decomposition.
|
|
//
|
|
// M = (Mee Meo) = (1 0 ) (Mee 0 ) (1 Mee^{-1} Meo)
|
|
// (Moe Moo) (Moe Mee^-1 1 ) (0 Moo-Moe Mee^-1 Meo) (0 1 )
|
|
//
|
|
// Determinant is det of middle factor
|
|
// This assumes Mee is indept of U.
|
|
//
|
|
template<class Impl>
|
|
class SchurDifferentiableOperator : public SchurDiagMooeeOperator<FermionOperator<Impl>,typename Impl::FermionField>
|
|
{
|
|
public:
|
|
INHERIT_IMPL_TYPES(Impl);
|
|
|
|
typedef FermionOperator<Impl> Matrix;
|
|
|
|
SchurDifferentiableOperator (Matrix &Mat) : SchurDiagMooeeOperator<Matrix,FermionField>(Mat) {};
|
|
|
|
void MpcDeriv(GaugeField &Force,const FermionField &U,const FermionField &V) {
|
|
|
|
GridBase *fgrid = this->_Mat.FermionGrid();
|
|
GridBase *fcbgrid = this->_Mat.FermionRedBlackGrid();
|
|
|
|
FermionField tmp1(fcbgrid);
|
|
FermionField tmp2(fcbgrid);
|
|
|
|
conformable(fcbgrid,U._grid);
|
|
conformable(fcbgrid,V._grid);
|
|
|
|
// Assert the checkerboard?? or code for either
|
|
assert(U.checkerboard==Odd);
|
|
assert(V.checkerboard==U.checkerboard);
|
|
|
|
// NOTE Guido: WE DO NOT WANT TO USE THE ucbgrid GRID FOR THE FORCE
|
|
// it is not conformable with the HMC force field
|
|
// Case: Ls vectorised fields
|
|
// INHERIT FROM THE Force field instead
|
|
GridRedBlackCartesian* forcecb = new GridRedBlackCartesian(Force._grid);
|
|
GaugeField ForceO(forcecb);
|
|
GaugeField ForceE(forcecb);
|
|
|
|
|
|
// X^dag Der_oe MeeInv Meo Y
|
|
// Use Mooee as nontrivial but gauge field indept
|
|
this->_Mat.Meooe (V,tmp1); // odd->even -- implicit -0.5 factor to be applied
|
|
this->_Mat.MooeeInv(tmp1,tmp2); // even->even
|
|
this->_Mat.MoeDeriv(ForceO,U,tmp2,DaggerNo);
|
|
// Accumulate X^dag M_oe MeeInv Der_eo Y
|
|
this->_Mat.MeooeDag (U,tmp1); // even->odd -- implicit -0.5 factor to be applied
|
|
this->_Mat.MooeeInvDag(tmp1,tmp2); // even->even
|
|
this->_Mat.MeoDeriv(ForceE,tmp2,V,DaggerNo);
|
|
|
|
assert(ForceE.checkerboard==Even);
|
|
assert(ForceO.checkerboard==Odd);
|
|
|
|
setCheckerboard(Force,ForceE);
|
|
setCheckerboard(Force,ForceO);
|
|
Force=-Force;
|
|
|
|
delete forcecb;
|
|
}
|
|
|
|
|
|
void MpcDagDeriv(GaugeField &Force,const FermionField &U,const FermionField &V) {
|
|
|
|
GridBase *fgrid = this->_Mat.FermionGrid();
|
|
GridBase *fcbgrid = this->_Mat.FermionRedBlackGrid();
|
|
|
|
FermionField tmp1(fcbgrid);
|
|
FermionField tmp2(fcbgrid);
|
|
|
|
conformable(fcbgrid,U._grid);
|
|
conformable(fcbgrid,V._grid);
|
|
|
|
// Assert the checkerboard?? or code for either
|
|
assert(V.checkerboard==Odd);
|
|
assert(V.checkerboard==V.checkerboard);
|
|
|
|
// NOTE Guido: WE DO NOT WANT TO USE THE ucbgrid GRID FOR THE FORCE
|
|
// it is not conformable with the HMC force field
|
|
// INHERIT FROM THE Force field instead
|
|
GridRedBlackCartesian* forcecb = new GridRedBlackCartesian(Force._grid);
|
|
GaugeField ForceO(forcecb);
|
|
GaugeField ForceE(forcecb);
|
|
|
|
// X^dag Der_oe MeeInv Meo Y
|
|
// Use Mooee as nontrivial but gauge field indept
|
|
this->_Mat.MeooeDag (V,tmp1); // odd->even -- implicit -0.5 factor to be applied
|
|
this->_Mat.MooeeInvDag(tmp1,tmp2); // even->even
|
|
this->_Mat.MoeDeriv(ForceO,U,tmp2,DaggerYes);
|
|
|
|
// Accumulate X^dag M_oe MeeInv Der_eo Y
|
|
this->_Mat.Meooe (U,tmp1); // even->odd -- implicit -0.5 factor to be applied
|
|
this->_Mat.MooeeInv(tmp1,tmp2); // even->even
|
|
this->_Mat.MeoDeriv(ForceE,tmp2,V,DaggerYes);
|
|
|
|
assert(ForceE.checkerboard==Even);
|
|
assert(ForceO.checkerboard==Odd);
|
|
|
|
setCheckerboard(Force,ForceE);
|
|
setCheckerboard(Force,ForceO);
|
|
Force=-Force;
|
|
|
|
delete forcecb;
|
|
}
|
|
|
|
};
|
|
|
|
NAMESPACE_END(Grid);
|
|
|
|
#endif
|