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133 lines
4.7 KiB
C++
133 lines
4.7 KiB
C++
/*************************************************************************************
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grid` physics library, www.github.com/paboyle/Grid
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Source file: ./tests/Test_cshift.cc
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Copyright (C) 2015
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Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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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 directory
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*************************************************************************************/
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/* END LEGAL */
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#include <Grid/Grid.h>
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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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std::vector<int> seeds({1,2,3,4});
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Grid_init(&argc,&argv);
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int threads = GridThread::GetThreads();
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std::vector<int> latt_size = GridDefaultLatt();
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std::vector<int> simd_layout( { vComplex::Nsimd(),1,1,1});
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std::vector<int> mpi_layout = GridDefaultMpi();
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int vol = 1;
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for(int d=0;d<latt_size.size();d++){
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vol = vol * latt_size[d];
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}
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GridCartesian GRID(latt_size,simd_layout,mpi_layout);
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GridSerialRNG sRNG; sRNG.SeedFixedIntegers(seeds); // naughty seeding
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GridParallelRNG pRNG(&GRID); pRNG.SeedFixedIntegers(seeds);
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FFT theFFT(&GRID);
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std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
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std::cout<< "*****************************************************************" <<std::endl;
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std::cout<< "* Testing we can gauge fix steep descent a RGT of Unit gauge *" <<std::endl;
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std::cout<< "*****************************************************************" <<std::endl;
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LatticeGaugeField Umu(&GRID);
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LatticeGaugeField Urnd(&GRID);
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LatticeGaugeField Uorg(&GRID);
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LatticeGaugeField Utmp(&GRID);
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LatticeColourMatrix g(&GRID); // Gauge xform
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LatticeColourMatrix xform1(&GRID); // Gauge xform
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LatticeColourMatrix xform2(&GRID); // Gauge xform
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SU3::ColdConfiguration(pRNG,Umu); // Unit gauge
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Uorg=Umu;
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Urnd=Umu;
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SU3::RandomGaugeTransform(pRNG,Urnd,g); // Unit gauge
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Real plaq=WilsonLoops<PeriodicGimplR>::avgPlaquette(Umu);
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std::cout << " Initial plaquette "<<plaq << std::endl;
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Real alpha=0.1;
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Umu = Urnd;
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FourierAcceleratedGaugeFixer<PeriodicGimplR>::SteepestDescentGaugeFix(Umu,xform1,alpha,10000,1.0e-12, 1.0e-12,false);
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// Check the gauge xform matrices
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Utmp=Urnd;
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SU<Nc>::GaugeTransform(Utmp,xform1);
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Utmp = Utmp - Umu;
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std::cout << " Norm Difference of xformed gauge "<< norm2(Utmp) << std::endl;
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plaq=WilsonLoops<PeriodicGimplR>::avgPlaquette(Umu);
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std::cout << " Final plaquette "<<plaq << std::endl;
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Uorg = Uorg - Umu;
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std::cout << " Norm Difference "<< norm2(Uorg) << std::endl;
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std::cout << " Norm "<< norm2(Umu) << std::endl;
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std::cout<< "*****************************************************************" <<std::endl;
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std::cout<< "* Testing Fourier accelerated fixing *" <<std::endl;
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std::cout<< "*****************************************************************" <<std::endl;
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Umu=Urnd;
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FourierAcceleratedGaugeFixer<PeriodicGimplR>::SteepestDescentGaugeFix(Umu,xform2,alpha,10000,1.0e-12, 1.0e-12,true);
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Utmp=Urnd;
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SU<Nc>::GaugeTransform(Utmp,xform2);
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Utmp = Utmp - Umu;
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std::cout << " Norm Difference of xformed gauge "<< norm2(Utmp) << std::endl;
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plaq=WilsonLoops<PeriodicGimplR>::avgPlaquette(Umu);
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std::cout << " Final plaquette "<<plaq << std::endl;
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std::cout<< "*****************************************************************" <<std::endl;
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std::cout<< "* Testing non-unit configuration *" <<std::endl;
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std::cout<< "*****************************************************************" <<std::endl;
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SU3::HotConfiguration(pRNG,Umu); // Unit gauge
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plaq=WilsonLoops<PeriodicGimplR>::avgPlaquette(Umu);
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std::cout << " Initial plaquette "<<plaq << std::endl;
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FourierAcceleratedGaugeFixer<PeriodicGimplR>::SteepestDescentGaugeFix(Umu,alpha,10000,1.0e-12, 1.0e-12,true);
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plaq=WilsonLoops<PeriodicGimplR>::avgPlaquette(Umu);
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std::cout << " Final plaquette "<<plaq << std::endl;
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Grid_finalize();
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}
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