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