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https://github.com/paboyle/Grid.git
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53 lines
1.2 KiB
C++
53 lines
1.2 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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latt_size.resize(4);
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latt_size[0] = 8;
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latt_size[1] = 8;
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latt_size[2] = 8;
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latt_size[3] = 8;
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double volume = latt_size[0]*latt_size[1]*latt_size[2]*latt_size[3];
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GridCartesian Fine(latt_size,simd_layout,mpi_layout);
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GridParallelRNG pRNG(&Fine);
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pRNG.SeedRandomDevice();
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LatticeLorentzColourMatrix U(&Fine);
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SU3::ColdConfiguration(pRNG, U);
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// simplify template?
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WilsonGaugeAction<LatticeLorentzColourMatrix, LatticeColourMatrix> Waction(6.0);
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//Collect actions
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ActionLevel Level1;
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Level1.push_back(&Waction);
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ActionSet FullSet;
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FullSet.push_back(Level1);
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// Create integrator
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IntegratorParameters MDpar(12,50,1.0);
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std::vector<int> rel ={1};
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Integrator<LeapFrog> MDleapfrog(MDpar, FullSet,rel);
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// Create HMC
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HMCparameters HMCpar;
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HybridMonteCarlo<LeapFrog> HMC(HMCpar, MDleapfrog, &Fine);
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HMC.evolve(U);
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}
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