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Grid/Hadrons/Modules/MNPR/Amputate.hpp

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: Hadrons/Modules/MNPR/Amputate.hpp
Copyright (C) 2015-2019
Author: Antonin Portelli <antonin.portelli@me.com>
Author: Julia Kettle J.R.Kettle-2@sms.ed.ac.uk
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 Hadrons_Amputate_hpp_
#define Hadrons_Amputate_hpp_
#include <Hadrons/Global.hpp>
#include <Hadrons/Module.hpp>
#include <Hadrons/ModuleFactory.hpp>
#include <Grid/Eigen/LU>
//#include <Grid/qcd/utils/PropagatorUtils.h>
//#include <Grid/serialisation/Serialisation.h>
BEGIN_HADRONS_NAMESPACE
/******************************************************************************
* TAmputate *
Performs bilinear contractions of the type tr[g5*adj(Sout)*g5*G*Sin]
Suitable for non exceptional momenta
******************************************************************************/
BEGIN_MODULE_NAMESPACE(MNPR)
class AmputatePar: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(AmputatePar,
std::string, Sin, //need to make this a propogator type?
std::string, Sout, //same
std::string, vertex,
std::string, pin,
std::string, pout,
std::string, output,
std::string, input);
};
template <typename FImpl1, typename FImpl2>
class TAmputate: public Module<AmputatePar>
{
public:
FERM_TYPE_ALIASES(FImpl1, 1);
FERM_TYPE_ALIASES(FImpl2, 2);
class Result: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(Result,
std::vector<Complex>, Vamp,
);
};
public:
// constructor
TAmputate(const std::string name);
// destructor
virtual ~TAmputate(void) {};
// dependencies/products
virtual std::vector<std::string> getInput(void);
virtual std::vector<std::string> getOutput(void);
virtual SpinColourMatrix invertspincolmat(SpinColourMatrix &scmat);
// execution
virtual void execute(void);
};
MODULE_REGISTER_TMP(Amputate, ARG(TAmputate<FIMPL, FIMPL>), MNPR);
/******************************************************************************
* TAmputate implementation *
******************************************************************************/
// constructor /////////////////////////////////////////////////////////////////
template <typename FImpl1, typename FImpl2>
TAmputate<FImpl1, FImpl2>::TAmputate(const std::string name)
: Module<AmputatePar>(name)
{}
// dependencies/products ///////////////////////////////////////////////////////
template <typename FImpl1, typename FImpl2>
std::vector<std::string> TAmputate<FImpl1, FImpl2>::getInput(void)
{
std::vector<std::string> input = {par().Sin, par().Sout, par().vertex};
return input;
}
template <typename FImpl1, typename FImpl2>
std::vector<std::string> TAmputate<FImpl1, FImpl2>::getOutput(void)
{
std::vector<std::string> output = {getName()};
return output;
}
// Invert spin colour matrix using Eigen
template <typename Fimpl1, typename Fimpl2>
SpinColourMatrix TAmputate<Fimpl1, Fimpl2>::invertspincolmat(SpinColourMatrix &scmat)
{
Eigen::MatrixXcf scmat_2d(Ns*Nc,Ns*Nc);
for(int ic=0; ic<Nc; ic++){
for(int jc=0; jc<Nc; jc++){
for(int is=0; is<Ns; is++){
for(int js=0; js<Ns; js++){
scmat_2d(Ns*ic+is,Ns*jc+js) = scmat()(is,js)(ic,jc);
}}
}}
Eigen::MatrixXcf scmat_2d_inv = scmat_2d.inverse();
SpinColourMatrix scmat_inv;
for(int ic=0; ic<Nc; ic++){
for(int jc=0; jc<Nc; jc++){
for(int is=0; is<Ns; is++){
for(int js=0; js<Ns; js++){
scmat_inv()(is,js)(ic,jc) = scmat_2d_inv(Ns*ic+is,Ns*jc+js);
}}
}}
return scmat_inv;
}
// execution ///////////////////////////////////////////////////////////////////
template <typename FImpl1, typename FImpl2>
void TAmputate<FImpl1, FImpl2>::execute(void)
{
LOG(Message) << "Computing bilinear amputations '" << getName() << "' using"
<< " momentum '" << par().Sin << "' and '" << par().Sout << "'"
<< std::endl;
BinaryWriter writer(par().output);
PropagatorField1 &Sin = *env().template getObject<PropagatorField1>(par().Sin); //Do these have the phases taken into account?? Don't think so. FIX
PropagatorField2 &Sout = *env().template getObject<PropagatorField2>(par().Sout);
std::vector<int> pin = strToVec<int>(par().pin), pout = strToVec<int>(par().pout);
std::vector<Real> latt_size(pin.begin(), pin.end());
LatticeComplex pdotxin(env().getGrid()), pdotxout(env().getGrid()), coor(env().getGrid());
LOG(Message) << "Propagators set up " << std::endl;
std::vector<SpinColourMatrix> vertex; // Let's read from file here
Gamma g5(Gamma::Algebra::Gamma5);
Result result;
LOG(Message) << "reading file - " << par().input << std::endl;
BinaryReader reader(par().input);
Complex Ci(0.0,1.0);
std::string svertex;
read(reader,"vertex", vertex);
LOG(Message) << "vertex read" << std::endl;
pdotxin=zero;
pdotxout=zero;
for (unsigned int mu = 0; mu < 4; ++mu)
{
Real TwoPiL = M_PI * 2.0/ latt_size[mu];
LatticeCoordinate(coor,mu);
pdotxin = pdotxin +(TwoPiL * pin[mu]) * coor;
pdotxout= pdotxout +(TwoPiL * pout[mu]) * coor;
}
Sin = Sin*exp(-Ci*pdotxin); //phase corrections
Sout = Sout*exp(-Ci*pdotxout);
SpinColourMatrix Sin_mom = sum(Sin);
SpinColourMatrix Sout_mom = sum(Sout);
LOG(Message) << "summed over lattice" << std::endl;
LOG(Message) << "Lattice -> spincolourmatrix conversion" << std::endl;
SpinColourMatrix Sin_inv = invertspincolmat(Sin_mom);
SpinColourMatrix Sout_inv = invertspincolmat(Sout_mom);
LOG(Message) << "Inversions done" << std::endl;
result.Vamp.resize(Gamma::nGamma/2);
for( int mu=0; mu < Gamma::nGamma/2; mu++){
Gamma::Algebra gam = mu;
result.Vamp[mu] = 1/12.0*trace(adj(Gamma(mu*2+1))*g5*Sout_inv*g5*vertex[mu]*Sin_inv);
LOG(Message) << "Vamp[" << mu << "] - " << result.Vamp[mu] << std::endl;
}
}
END_MODULE_NAMESPACE
END_HADRONS_NAMESPACE
#endif // Hadrons_Amputate_hpp_
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