mirror of
https://github.com/paboyle/Grid.git
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91 lines
2.2 KiB
C++
91 lines
2.2 KiB
C++
#include <Grid.h>
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#include <parallelIO/GridNerscIO.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> simd_layout({1,1,2,2});
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std::vector<int> mpi_layout ({2,2,2,2});
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std::vector<int> latt_size ({16,16,16,32});
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std::vector<int> clatt_size ({4,4,4,8});
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int orthodir=3;
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int orthosz =latt_size[orthodir];
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GridCartesian Fine(latt_size,simd_layout,mpi_layout);
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GridCartesian Coarse(clatt_size,simd_layout,mpi_layout);
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GridRNG FineRNG(&Fine);
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LatticeGaugeField Umu(&Fine);
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std::vector<LatticeColourMatrix> U(4,&Fine);
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NerscField header;
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std::string file("./ckpoint_lat.4000");
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readNerscConfiguration(Umu,header,file);
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for(int mu=0;mu<Nd;mu++){
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U[mu] = peekIndex<3>(Umu,mu);
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}
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// Painful ; fix syntactical niceness
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LatticeComplex LinkTrace(&Fine);
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LinkTrace=zero;
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for(int mu=0;mu<Nd;mu++){
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LinkTrace = LinkTrace + trace(U[mu]);
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}
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// (1+2+3)=6 = N(N-1)/2 terms
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LatticeComplex Plaq(&Fine);
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LatticeComplex cPlaq(&Coarse);
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Plaq = zero;
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for(int mu=1;mu<Nd;mu++){
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for(int nu=0;nu<mu;nu++){
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Plaq = Plaq + trace(U[mu]*Cshift(U[nu],mu,1)*adj(Cshift(U[mu],nu,1))*adj(U[nu]));
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}
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}
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double vol = Fine.gSites();
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Complex PlaqScale(1.0/vol/6.0/3.0);
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std::vector<TComplex> Plaq_T(orthosz);
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sliceSum(Plaq,Plaq_T,Nd-1);
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int Nt = Plaq_T.size();
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TComplex Plaq_T_sum=zero;
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for(int t=0;t<Nt;t++){
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Plaq_T_sum = Plaq_T_sum+Plaq_T[t];
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Complex Pt=TensorRemove(Plaq_T[t]);
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std::cout << "sliced ["<<t<<"]" <<Pt*PlaqScale*Real(Nt)<<std::endl;
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}
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{
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Complex Pt = TensorRemove(Plaq_T_sum);
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std::cout << "total " <<Pt*PlaqScale<<std::endl;
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}
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TComplex Tp = sum(Plaq);
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Complex p = TensorRemove(Tp);
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std::cout << "calculated plaquettes " <<p*PlaqScale<<std::endl;
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Complex LinkTraceScale(1.0/vol/4.0/3.0);
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TComplex Tl = sum(LinkTrace);
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Complex l = TensorRemove(Tl);
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std::cout << "calculated link trace " <<l*LinkTraceScale<<std::endl;
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sumBlocks(cPlaq,Plaq);
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TComplex TcP = sum(cPlaq);
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Complex ll= TensorRemove(TcP);
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std::cout << "coarsened plaquettes sum to " <<ll*PlaqScale<<std::endl;
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Grid_finalize();
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}
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