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https://github.com/paboyle/Grid.git
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69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
#include "Grid.h"
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using namespace std;
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using namespace Grid;
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using namespace Grid::QCD;
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int main (int argc, char ** argv)
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{
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Grid_init(&argc,&argv);
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std::vector<int> latt_size = GridDefaultLatt();
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std::vector<int> simd_layout = GridDefaultSimd(4,vComplex::Nsimd());
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std::vector<int> mpi_layout = GridDefaultMpi();
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GridCartesian Fine(latt_size,simd_layout,mpi_layout);
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GridRedBlackCartesian RBFine(latt_size,simd_layout,mpi_layout);
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std::vector<int> seeds({6,7,8,80});
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GridParallelRNG pRNG(&Fine);
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pRNG.SeedFixedIntegers(seeds);
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std::vector<int> seedsS({1,2,3,4});
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GridSerialRNG sRNG;
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sRNG.SeedFixedIntegers(seedsS);
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LatticeLorentzColourMatrix U(&Fine);
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SU3::HotConfiguration(pRNG, U);
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// simplify template declaration? Strip the lorentz from the second template
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WilsonGaugeActionR Waction(5.6);
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Real mass=-0.77;
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WilsonFermionR FermOp(U,Fine,RBFine,mass);
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ConjugateGradient<LatticeFermion> CG(1.0e-8,10000);
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TwoFlavourPseudoFermionAction<WilsonImplR> WilsonNf2(FermOp,CG,CG);
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//Collect actions
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ActionLevel<LatticeGaugeField> Level1(1);
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ActionLevel<LatticeGaugeField> Level2(4);
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Level1.push_back(&WilsonNf2);
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Level1.push_back(&Waction);
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// Level1.push_back(&Waction);
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ActionSet<LatticeGaugeField> FullSet;
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FullSet.push_back(Level1);
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// FullSet.push_back(Level2);
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// Create integrator
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typedef MinimumNorm2<LatticeGaugeField> IntegratorAlgorithm;// change here to change the algorithm
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// typedef LeapFrog IntegratorAlgorithm;// change here to change the algorithm
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IntegratorParameters MDpar(20);
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IntegratorAlgorithm MDynamics(&Fine,MDpar, FullSet);
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// Create HMC
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NerscHmcCheckpointer<LatticeGaugeField> Checkpoint(std::string("ckpoint_lat"),std::string("ckpoint_rng"),1);
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HMCparameters HMCpar;
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HybridMonteCarlo<LatticeGaugeField,IntegratorAlgorithm> HMC(HMCpar, MDynamics,sRNG,pRNG,U);
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HMC.AddObservable(&Checkpoint);
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// Run it
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HMC.evolve();
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}
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