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Reduce momentum to the GP plane

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This commit is contained in:
Peter Boyle 2021-04-22 15:56:59 -04:00
parent 0e959d9b94
commit 0d9aa87228
1 changed files with 22 additions and 7 deletions
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29
tests/forces/Test_gpwilson_force.cc
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@ -64,7 +64,9 @@ int main (int argc, char ** argv)
////////////////////////////////////
RealD mass=0.01;
const int nu = 3;
const int nu = 1;
const int Lnu=latt_size[nu];
std::vector<int> twists(Nd,0); twists[nu] = 1;
GparityWilsonFermionR::ImplParams params; params.twists = twists;
GparityWilsonFermionR Wil(U,*UGrid,*UrbGrid,mass,params);
@ -84,20 +86,31 @@ int main (int argc, char ** argv)
////////////////////////////////////
// Modify the gauge field a little
////////////////////////////////////
RealD dt = 0.01;
RealD dt = 0.1;
LatticeColourMatrix mommu(UGrid);
LatticeColourMatrix zz(UGrid);
LatticeColourMatrix forcemu(UGrid);
LatticeGaugeField mom(UGrid);
LatticeGaugeField Uprime(UGrid);
Lattice<iScalar<vInteger> > coor(UGrid);
LatticeCoordinate(coor,nu);
zz=Zero();
for(int mu=0;mu<Nd;mu++){
// Traceless antihermitian momentum; gaussian in lie alg
SU<Nc>::GaussianFundamentalLieAlgebraMatrix(RNG4, mommu);
if(mu==nu){
SU<Nc>::GaussianFundamentalLieAlgebraMatrix(RNG4, mommu);
mommu=where(coor==Lnu-1,mommu,zz);
//mommu=where(coor==0,mommu,zz);
// mommu=where(coor==1,mommu,zz);
} else {
mommu=Zero();
}
PokeIndex<LorentzIndex>(mom,mommu,mu);
// fourth order exponential approx
autoView( mom_v, mom, CpuRead);
autoView( U_v , U, CpuRead);
@ -139,12 +152,14 @@ int main (int argc, char ** argv)
// Update PF action density
dS = dS+trace(mommu*forcemu)*dt;
}
std::cout << "mommu"<<mommu<<std::endl;
std::cout << "dS" << dS<<std::endl;
ComplexD dSpred = sum(dS);
std::cout << GridLogMessage << " S "<<S<<std::endl;
std::cout << GridLogMessage << " Sprime "<<Sprime<<std::endl;
std::cout << GridLogMessage << "dS "<<Sprime-S<<std::endl;
std::cout << GridLogMessage << "Delta S "<<Sprime-S<<std::endl;
std::cout << GridLogMessage << "predict dS "<< dSpred <<std::endl;
assert( fabs(real(Sprime-S-dSpred)) < 2.0 ) ;