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Grid/Hadrons/Modules/MScalarSUN/TimeMomProbe.hpp

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: Hadrons/Modules/MScalarSUN/TimeMomProbe.hpp
Copyright (C) 2015-2018
Author: Antonin Portelli <antonin.portelli@me.com>
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_MScalarSUN_TimeMomProbe_hpp_
#define Hadrons_MScalarSUN_TimeMomProbe_hpp_
#include <Hadrons/Global.hpp>
#include <Hadrons/Module.hpp>
#include <Hadrons/ModuleFactory.hpp>
#include <Hadrons/Modules/MScalarSUN/Utils.hpp>
BEGIN_HADRONS_NAMESPACE
/******************************************************************************
* n-point functions O(t,p)*tr(phi(t_1,p_1)*...*phi(t_n,p_n)) *
******************************************************************************/
BEGIN_MODULE_NAMESPACE(MScalarSUN)
class TimeMomProbePar: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(TimeMomProbePar,
std::string, field,
std::vector<std::string>, op,
std::vector<std::vector<std::string>>, timeMom,
std::string, output);
};
class TimeMomProbeResult: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(TimeMomProbeResult,
std::string, op,
std::vector<std::vector<int>>, timeMom,
std::vector<Complex>, data);
};
template <typename SImpl>
class TTimeMomProbe: public Module<TimeMomProbePar>
{
public:
typedef typename SImpl::Field Field;
typedef typename SImpl::SiteField::scalar_object Site;
typedef typename SImpl::ComplexField ComplexField;
typedef std::vector<Complex> SlicedOp;
public:
// constructor
TTimeMomProbe(const std::string name);
// destructor
virtual ~TTimeMomProbe(void) {};
// dependency relation
virtual std::vector<std::string> getInput(void);
virtual std::vector<std::string> getOutput(void);
// setup
virtual void setup(void);
// execution
virtual void execute(void);
private:
void vectorModulo(std::vector<int> &v);
};
MODULE_REGISTER_TMP(TimeMomProbeSU2, TTimeMomProbe<ScalarNxNAdjImplR<2>>, MScalarSUN);
MODULE_REGISTER_TMP(TimeMomProbeSU3, TTimeMomProbe<ScalarNxNAdjImplR<3>>, MScalarSUN);
MODULE_REGISTER_TMP(TimeMomProbeSU4, TTimeMomProbe<ScalarNxNAdjImplR<4>>, MScalarSUN);
MODULE_REGISTER_TMP(TimeMomProbeSU5, TTimeMomProbe<ScalarNxNAdjImplR<5>>, MScalarSUN);
MODULE_REGISTER_TMP(TimeMomProbeSU6, TTimeMomProbe<ScalarNxNAdjImplR<6>>, MScalarSUN);
/******************************************************************************
* TTimeMomProbe implementation *
******************************************************************************/
// constructor /////////////////////////////////////////////////////////////////
template <typename SImpl>
TTimeMomProbe<SImpl>::TTimeMomProbe(const std::string name)
: Module<TimeMomProbePar>(name)
{}
// dependencies/products ///////////////////////////////////////////////////////
template <typename SImpl>
std::vector<std::string> TTimeMomProbe<SImpl>::getInput(void)
{
std::vector<std::string> in = par().op;
in.push_back(par().field);
return in;
}
template <typename SImpl>
std::vector<std::string> TTimeMomProbe<SImpl>::getOutput(void)
{
std::vector<std::string> out;
return out;
}
// setup ///////////////////////////////////////////////////////////////////////
template <typename SImpl>
void TTimeMomProbe<SImpl>::setup(void)
{
envTmpLat(ComplexField, "ftBuf");
envTmpLat(Field, "ftMatBuf");
}
// execution ///////////////////////////////////////////////////////////////////
// NB: time is direction 0
template <typename SImpl>
void TTimeMomProbe<SImpl>::vectorModulo(std::vector<int> &v)
{
for (unsigned int mu = 0; mu < env().getNd(); ++mu)
{
auto d = env().getDim(mu);
v[mu] = ((v[mu] % d) + d) % d;
}
}
template <typename SImpl>
void TTimeMomProbe<SImpl>::execute(void)
{
const unsigned int nd = env().getNd();
const unsigned int nt = env().getDim(0);
double partVol = 1.;
std::set<std::vector<int>> timeMomSet;
std::vector<std::vector<std::vector<int>>> timeMom;
std::vector<std::vector<int>> transferMom;
FFT fft(env().getGrid());
std::vector<int> dMask(nd, 1);
std::vector<TimeMomProbeResult> result;
std::map<std::string, std::vector<SlicedOp>> slicedOp;
std::vector<SlicedOp> slicedProbe;
auto &phi = envGet(Field, par().field);
envGetTmp(ComplexField, ftBuf);
envGetTmp(Field, ftMatBuf);
dMask[0] = 0;
for (unsigned int mu = 1; mu < nd; ++mu)
{
partVol *= env().getDim(mu);
}
timeMom.resize(par().timeMom.size());
for (unsigned int p = 0; p < timeMom.size(); ++p)
{
for (auto &tms: par().timeMom[p])
{
std::vector<int> tm = strToVec<int>(tms);
timeMom[p].push_back(tm);
timeMomSet.insert(tm);
}
transferMom.push_back(std::vector<int>(nd - 1, 0));
for (auto &tm: timeMom[p])
{
for (unsigned int j = 1; j < nd; ++j)
{
transferMom[p][j - 1] -= tm[j];
}
}
LOG(Message) << "Probe " << p << " (" << timeMom[p].size() << " points) : " << std::endl;
LOG(Message) << " phi(t_i, p_i) for (t_i, p_i) in " << timeMom[p] << std::endl;
LOG(Message) << " operator with momentum " << transferMom[p] << std::endl;
}
LOG(Message) << "FFT: field '" << par().field << "'" << std::endl;
fft.FFT_dim_mask(ftMatBuf, phi, dMask, FFT::forward);
slicedProbe.resize(timeMom.size());
for (unsigned int p = 0; p < timeMom.size(); ++p)
{
std::vector<int> qt;
LOG(Message) << "Making probe " << p << std::endl;
slicedProbe[p].resize(nt);
for (unsigned int t = 0; t < nt; ++t)
{
Site acc;
for (unsigned int i = 0; i < timeMom[p].size(); ++i)
{
Site buf;
qt = timeMom[p][i];
qt[0] += t;
vectorModulo(qt);
peekSite(buf, ftMatBuf, qt);
if (i == 0)
{
acc = buf;
}
else
{
acc *= buf;
}
}
slicedProbe[p][t] = TensorRemove(trace(acc));
}
//std::cout << slicedProbe[p]<< std::endl;
}
for (auto &o: par().op)
{
auto &op = envGet(ComplexField, o);
slicedOp[o].resize(transferMom.size());
LOG(Message) << "FFT: operator '" << o << "'" << std::endl;
fft.FFT_dim_mask(ftBuf, op, dMask, FFT::forward);
//std::cout << ftBuf << std::endl;
for (unsigned int p = 0; p < transferMom.size(); ++p)
{
std::vector<int> qt(nd, 0);
for (unsigned int j = 1; j < nd; ++j)
{
qt[j] = transferMom[p][j - 1];
}
slicedOp[o][p].resize(nt);
for (unsigned int t = 0; t < nt; ++t)
{
TComplex buf;
qt[0] = t;
vectorModulo(qt);
peekSite(buf, ftBuf, qt);
slicedOp[o][p][t] = TensorRemove(buf);
}
//std::cout << ftBuf << std::endl;
//std::cout << slicedOp[o][p] << std::endl;
}
}
LOG(Message) << "Making correlators" << std::endl;
for (auto &o: par().op)
for (unsigned int p = 0; p < timeMom.size(); ++p)
{
TimeMomProbeResult r;
LOG(Message) << " <" << o << " probe_" << p << ">" << std::endl;
r.op = o;
r.timeMom = timeMom[p];
r.data = makeTwoPoint(slicedOp[o][p], slicedProbe[p], 1./partVol);
result.push_back(r);
}
saveResult(par().output, "timemomprobe", result);
}
END_MODULE_NAMESPACE
END_HADRONS_NAMESPACE
#endif // Hadrons_MScalarSUN_TimeMomProbe_hpp_
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