From 1ba61680dbfc7d8fc6672d7f19e2babd342e0a06 Mon Sep 17 00:00:00 2001 From: Guido Cossu Date: Wed, 17 Jan 2018 18:17:58 +0000 Subject: [PATCH] First implementation of the sh-Gordon action --- lib/qcd/action/scalar/Scalar.h | 4 + lib/qcd/action/scalar/shGordonAction.h | 75 +++++++++++++++++++ tests/hmc/Test_hmc_shGordonAction.cc | 100 +++++++++++++++++++++++++ 3 files changed, 179 insertions(+) create mode 100644 lib/qcd/action/scalar/shGordonAction.h create mode 100644 tests/hmc/Test_hmc_shGordonAction.cc diff --git a/lib/qcd/action/scalar/Scalar.h b/lib/qcd/action/scalar/Scalar.h index 485a6765..0ccc1e1d 100644 --- a/lib/qcd/action/scalar/Scalar.h +++ b/lib/qcd/action/scalar/Scalar.h @@ -32,6 +32,7 @@ directory #include #include #include +#include namespace Grid { namespace QCD { @@ -44,6 +45,9 @@ namespace QCD { template using ScalarAdjActionF = ScalarInteractionAction, Dimensions>; template using ScalarAdjActionD = ScalarInteractionAction, Dimensions>; + typedef shGordonAction shGordonActionR; + typedef shGordonAction shGordonActionF; + typedef shGordonAction shGordonActionD; } } diff --git a/lib/qcd/action/scalar/shGordonAction.h b/lib/qcd/action/scalar/shGordonAction.h new file mode 100644 index 00000000..3b402c72 --- /dev/null +++ b/lib/qcd/action/scalar/shGordonAction.h @@ -0,0 +1,75 @@ +/************************************************************************************* + + Grid physics library, www.github.com/paboyle/Grid + + Source file: ./lib/qcd/action/gauge/shGordonAction.h + + Copyright (C) 2018 + + Author: Guido Cossu + + 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 SHGORDON_ACTION_H +#define SHGORDON_ACTION_H + +namespace Grid { + +template +class shGordonAction : public QCD::Action { + public: + INHERIT_FIELD_TYPES(Impl); + + private: + RealD mass_square; + RealD g; + + public: + shGordonAction(RealD ms, RealD g) : mass_square(ms), g(g) {} + + virtual std::string LogParameters() { + std::stringstream sstream; + sstream << GridLogMessage << "[shGordonAction] g : " << g << std::endl; + sstream << GridLogMessage << "[shGordonAction] mass_square : " << mass_square << std::endl; + return sstream.str(); + } + virtual std::string action_name() {return "shGordonAction";} + + virtual void refresh(const Field &U, GridParallelRNG &pRNG) {} // noop as no pseudoferms + + virtual RealD S(const Field &phi) { + return 0.5*ScalarObs::sumphider(phi) - 0.5*mass_square/(g*g)*sum(trace(exp(g*phi) + exp(-g*phi))) ; + }; + + virtual void deriv(const Field &phi, + Field &force) { + Field tmp(phi._grid); + tmp = zero; + for (int mu = 0; mu < QCD::Nd; mu++) tmp += Cshift(phi, mu, 1) - Cshift(phi, mu, -1); + + force+= 0.5*tmp - 0.5*mass_square/g*(exp(g*phi) - exp(-g*phi)); + } +}; + + + +} // namespace Grid + +#endif // SHGORDON_ACTION_H diff --git a/tests/hmc/Test_hmc_shGordonAction.cc b/tests/hmc/Test_hmc_shGordonAction.cc new file mode 100644 index 00000000..96be6a96 --- /dev/null +++ b/tests/hmc/Test_hmc_shGordonAction.cc @@ -0,0 +1,100 @@ +/************************************************************************************* + +Grid physics library, www.github.com/paboyle/Grid + +Source file: ./tests/Test_hmc_shGordonAction.cc + +Copyright (C) 2018 + +Author: Guido Cossu + +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 */ +#include + +int main(int argc, char **argv) { + using namespace Grid; + using namespace Grid::QCD; + + Grid_init(&argc, &argv); + int threads = GridThread::GetThreads(); + // here make a routine to print all the relevant information on the run + std::cout << GridLogMessage << "Grid is setup to use " << threads << " threads" << std::endl; + + // Typedefs to simplify notation + typedef ScalarGenericHMCRunner HMCWrapper; // Uses the default minimum norm, real scalar fields + //typedef Representations::Field> > ScalarMatrixFields; + //typedef HMCWrapperTemplate, MinimumNorm2, ScalarMatrixFields> HMCWrapper; + //:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: + HMCWrapper TheHMC; + + // Grid from the command line + GridModule ScalarGrid; + ScalarGrid.set_full( SpaceTimeGrid::makeFourDimGrid( + GridDefaultLatt(), GridDefaultSimd(Nd, vReal::Nsimd()), + GridDefaultMpi())); + ScalarGrid.set_rb(SpaceTimeGrid::makeFourDimRedBlackGrid(ScalarGrid.get_full())); + TheHMC.Resources.AddGrid("scalar", ScalarGrid); + // Possibile to create the module by hand + // hardcoding parameters or using a Reader + + // Checkpointer definition + CheckpointerParameters CPparams; + CPparams.config_prefix = "ckpoint_scalar_lat"; + CPparams.rng_prefix = "ckpoint_scalar_rng"; + CPparams.saveInterval = 50; + CPparams.format = "IEEE64BIG"; + + TheHMC.Resources.LoadBinaryCheckpointer(CPparams); + + RNGModuleParameters RNGpar; + RNGpar.serial_seeds = "1 2 3 4 5"; + RNGpar.parallel_seeds = "6 7 8 9 10"; + TheHMC.Resources.SetRNGSeeds(RNGpar); + + ////////////////////////////////////////////// + + ///////////////////////////////////////////////////////////// + // Collect actions, here use more encapsulation + // need wrappers of the fermionic classes + // that have a complex construction + // standard + + // Real Scalar action + shGordonActionR Saction(1.0,1.0); + + // Collect actions + ActionLevel Level1(1); + Level1.push_back(&Saction); + + TheHMC.TheAction.push_back(Level1); + ///////////////////////////////////////////////////////////// + + + // HMC parameters are serialisable + TheHMC.Parameters.MD.MDsteps = 60; + TheHMC.Parameters.MD.trajL = 1.0; + + TheHMC.ReadCommandLine(argc, argv); // these can be parameters from file + TheHMC.Run(); + + Grid_finalize(); + +} // main + +