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93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file:
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Copyright (C) 2017
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Author: Peter Boyle
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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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#include <string>
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template <class T> void readFile(T& out, std::string const fname){
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#ifdef HAVE_LIME
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Grid::emptyUserRecord record;
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Grid::ScidacReader RD;
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RD.open(fname);
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RD.readScidacFieldRecord(out,record);
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RD.close();
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#endif
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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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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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LatticeComplexD plaq1(&Grid), plaq2(&Grid);
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FieldMetaData header;
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double vol = plaq1.Grid()->gSites();
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std::string file1(argv[1]);
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std::cout << "Reading "<<file1<<std::endl;
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readFile(plaq1,file1);
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std::string file2(argv[2]);
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std::cout << "Reading "<<file2<<std::endl;
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readFile(plaq2,file2);
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auto p1bar = TensorRemove(sum(plaq1));
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auto p2bar = TensorRemove(sum(plaq2));
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p1bar = p1bar / vol;
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p2bar = p2bar / vol;
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std::cout<< GridLogMessage << "p1bar = "<<p1bar<<std::endl;
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std::cout<< GridLogMessage << "p2bar = "<<p2bar<<std::endl;
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auto corr_site = plaq1 * plaq2 - p1bar * p2bar;
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auto corr_bar = TensorRemove(sum(corr_site))/vol;
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auto cov1_site = plaq1 * plaq1 - p1bar * p1bar;
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auto cov1_bar = TensorRemove(sum(cov1_site))/vol;
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auto cov2_site = plaq2 * plaq2 - p2bar * p2bar;
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auto cov2_bar = TensorRemove(sum(cov2_site))/vol;
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std::cout<< GridLogMessage << "cov_bar = "<<corr_bar<<std::endl;
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std::cout<< GridLogMessage << "corr_bar = "<<corr_bar/sqrt(cov1_bar*cov2_bar)<<std::endl;
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Grid_finalize();
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} // main
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