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90 lines
2.0 KiB
C++
90 lines
2.0 KiB
C++
#include <Grid.h>
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#include <qcd/utils/CovariantCshift.h>
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#include <qcd/utils/WilsonLoops.h>
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#include <qcd/utils/SUn.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({8,8,8,8});
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GridCartesian * grid = SpaceTimeGrid::makeFourDimGrid(latt,
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GridDefaultSimd(Nd,vComplexF::Nsimd()),
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GridDefaultMpi());
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GridRedBlackCartesian * rbGrid = SpaceTimeGrid::makeFourDimRedBlackGrid(grid);
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///////////////////////////////
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// Configuration of known size
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///////////////////////////////
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LatticeGaugeField Umu(grid);
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Umu=1.0; // Cold start
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// RNG set up for test
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std::vector<int> pseeds({1,2,3,4,5}); // once I caught a fish alive
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std::vector<int> sseeds({6,7,8,9,10});// then i let it go again
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GridParallelRNG pRNG(grid); pRNG.SeedFixedIntegers(pseeds);
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GridSerialRNG sRNG; sRNG.SeedFixedIntegers(sseeds);
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// SU3 colour operatoions
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LatticeColourMatrix link(grid);
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LatticeColourMatrix staple(grid);
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int mu=0;
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// Apply heatbath to the link
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RealD beta=6.0;
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int subsets[2] = { Even, Odd};
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LatticeInteger one(rbGrid); one = 1; // fill with ones
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LatticeInteger mask(grid);
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for(int sweep=0;sweep<1000;sweep++){
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RealD plaq = ColourWilsonLoops::avgPlaquette(Umu);
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std::cout<<"sweep "<<sweep<<" PLAQUETTE "<<plaq<<std::endl;
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for( int cb=0;cb<2;cb++ ) {
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one.checkerboard=subsets[cb];
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mask= zero;
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setCheckerboard(mask,one);
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// std::cout<<mask<<std::endl;
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for(int mu=0;mu<Nd;mu++){
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// Get Link and Staple term in action; must contain Beta and
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// any other coeffs
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ColourWilsonLoops::Staple(staple,Umu,mu);
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staple = adj(staple);
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link = PeekIndex<LorentzIndex>(Umu,mu);
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for( int subgroup=0;subgroup<SU3::su2subgroups();subgroup++ ) {
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// update Even checkerboard
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SU3::SubGroupHeatBath(sRNG,pRNG,beta,link,staple,subgroup,20,mask);
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}
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pokeIndex<LorentzIndex>(Umu,link,mu);
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//reunitarise link;
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}
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}
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}
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Grid_finalize();
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}
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