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Hadrons: scalar SU(N) stochastic free field
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/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: extras/Hadrons/Modules.hpp
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Copyright (C) 2015-2018
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Author: Antonin Portelli <antonin.portelli@me.com>
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Author: Guido Cossu <guido.cossu@ed.ac.uk>
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Author: Lanny91 <andrew.lawson@gmail.com>
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Author: pretidav <david.preti@csic.es>
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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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#include <Grid/Hadrons/Modules/MContraction/Baryon.hpp>
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#include <Grid/Hadrons/Modules/MContraction/Meson.hpp>
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#include <Grid/Hadrons/Modules/MContraction/WeakHamiltonian.hpp>
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@ -61,6 +31,7 @@ See the full license in the file "LICENSE" in the top level distribution directo
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#include <Grid/Hadrons/Modules/MAction/Wilson.hpp>
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#include <Grid/Hadrons/Modules/MAction/WilsonClover.hpp>
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#include <Grid/Hadrons/Modules/MAction/ZMobiusDWF.hpp>
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#include <Grid/Hadrons/Modules/MScalarSUN/StochFreeField.hpp>
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#include <Grid/Hadrons/Modules/MScalarSUN/ShiftProbe.hpp>
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#include <Grid/Hadrons/Modules/MScalarSUN/Div.hpp>
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#include <Grid/Hadrons/Modules/MScalarSUN/TrMag.hpp>
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11
extras/Hadrons/Modules/MScalarSUN/StochFreeField.cc
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11
extras/Hadrons/Modules/MScalarSUN/StochFreeField.cc
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#include <Grid/Hadrons/Modules/MScalarSUN/StochFreeField.hpp>
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using namespace Grid;
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using namespace Hadrons;
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using namespace MScalarSUN;
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template class Grid::Hadrons::MScalarSUN::TStochFreeField<ScalarNxNAdjImplR<2>>;
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template class Grid::Hadrons::MScalarSUN::TStochFreeField<ScalarNxNAdjImplR<3>>;
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template class Grid::Hadrons::MScalarSUN::TStochFreeField<ScalarNxNAdjImplR<4>>;
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template class Grid::Hadrons::MScalarSUN::TStochFreeField<ScalarNxNAdjImplR<5>>;
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template class Grid::Hadrons::MScalarSUN::TStochFreeField<ScalarNxNAdjImplR<6>>;
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136
extras/Hadrons/Modules/MScalarSUN/StochFreeField.hpp
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136
extras/Hadrons/Modules/MScalarSUN/StochFreeField.hpp
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#ifndef Hadrons_MScalarSUN_StochFreeField_hpp_
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#define Hadrons_MScalarSUN_StochFreeField_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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BEGIN_HADRONS_NAMESPACE
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/******************************************************************************
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* stochastic free SU(N) scalar field *
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******************************************************************************/
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BEGIN_MODULE_NAMESPACE(MScalarSUN)
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class StochFreeFieldPar: Serializable
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{
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public:
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GRID_SERIALIZABLE_CLASS_MEMBERS(StochFreeFieldPar,
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double, m2,
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double, g);
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};
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template <typename SImpl>
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class TStochFreeField: public Module<StochFreeFieldPar>
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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::ComplexField ComplexField;
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typedef typename SImpl::Group Group;
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typedef typename Group::LatticeAlgebraVector AlgebraField;
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public:
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// constructor
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TStochFreeField(const std::string name);
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// destructor
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virtual ~TStochFreeField(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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bool create_weight;
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};
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MODULE_REGISTER_TMP(StochFreeFieldSU2, TStochFreeField<ScalarNxNAdjImplR<2>>, MScalarSUN);
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MODULE_REGISTER_TMP(StochFreeFieldSU3, TStochFreeField<ScalarNxNAdjImplR<3>>, MScalarSUN);
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MODULE_REGISTER_TMP(StochFreeFieldSU4, TStochFreeField<ScalarNxNAdjImplR<4>>, MScalarSUN);
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MODULE_REGISTER_TMP(StochFreeFieldSU5, TStochFreeField<ScalarNxNAdjImplR<5>>, MScalarSUN);
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MODULE_REGISTER_TMP(StochFreeFieldSU6, TStochFreeField<ScalarNxNAdjImplR<6>>, MScalarSUN);
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/******************************************************************************
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* TStochFreeField implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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template <typename SImpl>
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TStochFreeField<SImpl>::TStochFreeField(const std::string name)
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: Module<StochFreeFieldPar>(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> TStochFreeField<SImpl>::getInput(void)
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{
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std::vector<std::string> in;
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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> TStochFreeField<SImpl>::getOutput(void)
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{
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std::vector<std::string> out = {getName()};
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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 TStochFreeField<SImpl>::setup(void)
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{
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create_weight = false;
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if (!env().hasCreatedObject("_" + getName() + "_weight"))
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{
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envCacheLat(ComplexField, "_" + getName() + "_weight");
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create_weight = true;
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}
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envTmpLat(Field, "phift");
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envCreateLat(Field, getName());
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}
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// execution ///////////////////////////////////////////////////////////////////
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template <typename SImpl>
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void TStochFreeField<SImpl>::execute(void)
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{
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LOG(Message) << "Generating stochastic scalar field" << std::endl;
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const unsigned int N = Group::Dimension;
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const unsigned int Nadj = Group::AdjointDimension;
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auto &phi = envGet(Field, getName());
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auto &w = envGet(ComplexField, "_" + getName() + "_weight");
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auto &rng = *env().get4dRng();
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double trphi2;
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FFT fft(env().getGrid());
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Integer vol;
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vol = 1;
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for(int d = 0; d < env().getNd(); d++)
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{
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vol = vol*env().getDim(d);
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}
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if (create_weight)
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{
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LOG(Message) << "Caching momentum-space scalar action" << std::endl;
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SImpl::MomentumSpacePropagator(w, sqrt(par().m2));
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w *= par().g/N;
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w = sqrt(vol*real(w));
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}
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LOG(Message) << "Generating random momentum-space field" << std::endl;
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envGetTmp(Field, phift);
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Group::GaussianFundamentalLieAlgebraMatrix(rng, phift);
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phift *= w;
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LOG(Message) << "Field Fourier transform" << std::endl;
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fft.FFT_all_dim(phi, phift, FFT::backward);
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phi = (1./sqrt(2.))*(phi - adj(phi));
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trphi2 = -TensorRemove(sum(trace(phi*phi))).real()/vol;
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LOG(Message) << "tr(phi^2)= " << trphi2 << std::endl;
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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_StochFreeField_hpp_
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@ -37,6 +37,7 @@ modules_cc =\
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Modules/MScalarSUN/EMT.cc \
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Modules/MScalarSUN/ShiftProbe.cc \
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Modules/MScalarSUN/TransProj.cc \
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Modules/MScalarSUN/StochFreeField.cc \
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Modules/MScalarSUN/TwoPoint.cc \
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Modules/MScalarSUN/Div.cc \
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Modules/MIO/LoadEigenPack.cc \
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@ -78,6 +79,7 @@ modules_hpp =\
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Modules/MAction/Wilson.hpp \
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Modules/MAction/WilsonClover.hpp \
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Modules/MAction/ZMobiusDWF.hpp \
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Modules/MScalarSUN/StochFreeField.hpp \
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Modules/MScalarSUN/ShiftProbe.hpp \
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Modules/MScalarSUN/Div.hpp \
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Modules/MScalarSUN/TrMag.hpp \
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