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153 lines
4.7 KiB
C++
153 lines
4.7 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./tests/hmc/Test_WilsonFlow.cc
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Copyright (C) 2017
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Author: Guido Cossu <guido.cossu@ed.ac.uk>
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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
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directory
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*************************************************************************************/
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/* END LEGAL */
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#include <Grid/Grid.h>
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namespace Grid{
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struct WFParameters: Serializable {
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GRID_SERIALIZABLE_CLASS_MEMBERS(WFParameters,
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int, steps,
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double, step_size,
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int, meas_interval,
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double, maxTau); // for the adaptive algorithm
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template <class ReaderClass >
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WFParameters(Reader<ReaderClass>& Reader){
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read(Reader, "WilsonFlow", *this);
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}
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};
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struct ConfParameters: Serializable {
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GRID_SERIALIZABLE_CLASS_MEMBERS(ConfParameters,
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std::string, conf_prefix,
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std::string, rng_prefix,
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int, StartConfiguration,
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int, EndConfiguration,
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int, Skip);
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template <class ReaderClass >
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ConfParameters(Reader<ReaderClass>& Reader){
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read(Reader, "Configurations", *this);
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}
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};
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}
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int main(int argc, char **argv) {
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using namespace Grid;
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;
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Grid_init(&argc, &argv);
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GridLogLayout();
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auto latt_size = GridDefaultLatt();
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auto simd_layout = GridDefaultSimd(Nd, vComplex::Nsimd());
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auto mpi_layout = GridDefaultMpi();
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GridCartesian Grid(latt_size, simd_layout, mpi_layout);
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GridRedBlackCartesian RBGrid(&Grid);
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std::vector<int> seeds({1, 2, 3, 4, 5});
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GridSerialRNG sRNG;
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GridParallelRNG pRNG(&Grid);
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pRNG.SeedFixedIntegers(seeds);
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LatticeGaugeField Umu(&Grid), Uflow(&Grid);
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SU<Nc>::HotConfiguration(pRNG, Umu);
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typedef Grid::XmlReader Serialiser;
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Serialiser Reader("input.xml");
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WFParameters WFPar(Reader);
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ConfParameters CPar(Reader);
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CheckpointerParameters CPPar(CPar.conf_prefix, CPar.rng_prefix);
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BinaryHmcCheckpointer<PeriodicGimplR> CPBin(CPPar);
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for (int conf = CPar.StartConfiguration; conf <= CPar.EndConfiguration; conf+= CPar.Skip){
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CPBin.CheckpointRestore(conf, Umu, sRNG, pRNG);
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std::cout << std::setprecision(15);
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std::cout << GridLogMessage << "Initial plaquette: "
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<< WilsonLoops<PeriodicGimplR>::avgPlaquette(Umu) << std::endl;
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WilsonFlow<PeriodicGimplR> WF(WFPar.steps, WFPar.step_size, WFPar.meas_interval);
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WF.smear_adaptive(Uflow, Umu, WFPar.maxTau);
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RealD WFlow_plaq = WilsonLoops<PeriodicGimplR>::avgPlaquette(Uflow);
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RealD WFlow_TC = WilsonLoops<PeriodicGimplR>::TopologicalCharge(Uflow);
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RealD WFlow_T0 = WF.energyDensityPlaquette(Uflow);
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std::cout << GridLogMessage << "Plaquette "<< conf << " " << WFlow_plaq << std::endl;
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std::cout << GridLogMessage << "T0 "<< conf << " " << WFlow_T0 << std::endl;
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std::cout << GridLogMessage << "TopologicalCharge "<< conf << " " << WFlow_TC << std::endl;
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std::cout<< GridLogMessage << " Admissibility check:\n";
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const double sp_adm = 0.067; // admissible threshold
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const double pl_adm = 1.0-sp_adm/Nc;
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std::cout << GridLogMessage << " (pl_adm =" << pl_adm << ")\n";
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// Need min and reduce min for this function
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//double sp_max = NC_*(1.0-stpl.plaq_min(U,pl_adm));
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double sp_ave = Nc*(1.0-WFlow_plaq);
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//std::cout<< GridLogMessage << " sp_max = " << sp_max <<"\n";
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std::cout<< GridLogMessage << " sp_ave = " << sp_ave <<"\n";
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std::cout<< GridLogMessage << " (sp_admissible = "<< sp_adm <<")\n";
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//std::cout<< GridLogMessage << " sp_admissible - sp_max = "<<sp_adm-sp_max <<"\n";
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std::cout<< GridLogMessage << " sp_admissible - sp_ave = "<<sp_adm-sp_ave <<"\n";
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}
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Grid_finalize();
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} // main
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/*
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Input file example
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JSON
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{
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"WilsonFlow":{
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"steps": 200,
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"step_size": 0.01,
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"meas_interval": 50,
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"maxTau": 2.0
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},
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"Configurations":{
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"conf_prefix": "ckpoint_lat",
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"rng_prefix": "ckpoint_rng",
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"StartConfiguration": 3000,
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"EndConfiguration": 3000,
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"Skip": 5
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}
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}
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*/
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