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Project to SU(N)

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This commit is contained in:
Peter Boyle 2020-11-24 21:46:10 -05:00
parent 5ff3eae027
commit 321f0f51b5
6 changed files with 30 additions and 10 deletions
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4
Grid/qcd/action/gauge/GaugeImplTypes.h
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@ -154,6 +154,10 @@ public:
return Hsum.real(); return Hsum.real();
} }
static inline void Project(Field &U) {
ProjectSUn(U);
}
static inline void HotConfiguration(GridParallelRNG &pRNG, Field &U) { static inline void HotConfiguration(GridParallelRNG &pRNG, Field &U) {
SU<Nc>::HotConfiguration(pRNG, U); SU<Nc>::HotConfiguration(pRNG, U);
} }

8
Grid/qcd/action/scalar/ScalarImpl.h
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@ -54,6 +54,10 @@ public:
static inline void ColdConfiguration(GridParallelRNG &pRNG, Field &U) { static inline void ColdConfiguration(GridParallelRNG &pRNG, Field &U) {
U = 1.0; U = 1.0;
} }
static inline void Project(Field &U) {
return;
}
static void MomentumSpacePropagator(Field &out, RealD m) static void MomentumSpacePropagator(Field &out, RealD m)
{ {
@ -234,6 +238,10 @@ public:
#endif //USE_FFT_ACCELERATION #endif //USE_FFT_ACCELERATION
} }
static inline void Project(Field &U) {
return;
}
static inline void HotConfiguration(GridParallelRNG &pRNG, Field &U) { static inline void HotConfiguration(GridParallelRNG &pRNG, Field &U) {
Group::GaussianFundamentalLieAlgebraMatrix(pRNG, U); Group::GaussianFundamentalLieAlgebraMatrix(pRNG, U);
} }

2
Grid/qcd/hmc/HMC.h
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@ -95,7 +95,7 @@ private:
typedef typename IntegratorType::Field Field; typedef typename IntegratorType::Field Field;
typedef std::vector< HmcObservable<Field> * > ObsListType; typedef std::vector< HmcObservable<Field> * > ObsListType;
//pass these from the resource manager //pass these from the resource manager
GridSerialRNG &sRNG; GridSerialRNG &sRNG;
GridParallelRNG &pRNG; GridParallelRNG &pRNG;

2
Grid/qcd/hmc/integrators/Integrator.h
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@ -313,6 +313,8 @@ public:
std::cout << GridLogIntegrator << " times[" << level << "]= " << t_P[level] << " " << t_U << std::endl; std::cout << GridLogIntegrator << " times[" << level << "]= " << t_P[level] << " " << t_U << std::endl;
} }
FieldImplementation::Project(U);
// and that we indeed got to the end of the trajectory // and that we indeed got to the end of the trajectory
assert(fabs(t_U - Params.trajL) < 1.0e-6); assert(fabs(t_U - Params.trajL) < 1.0e-6);

5
Grid/qcd/utils/SUn.h
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@ -820,7 +820,6 @@ LatticeComplexD Determinant(const Lattice<iScalar<iScalar<iMatrix<vComplexD, N>
}} }}
ComplexD det = EigenU.determinant(); ComplexD det = EigenU.determinant();
pokeLocalSite(det,ret_v,lcoor); pokeLocalSite(det,ret_v,lcoor);
std::cout << " site " <<site<<" det " <<det <<std::endl;
}); });
return ret; return ret;
} }
@ -830,8 +829,8 @@ static void ProjectSUn(Lattice<iScalar<iScalar<iMatrix<vComplexD, N> > > > &Umu)
Umu = ProjectOnGroup(Umu); Umu = ProjectOnGroup(Umu);
auto det = Determinant(Umu); auto det = Determinant(Umu);
det = pow(det,-1); det = conjugate(det);
for(int i=0;i<N;i++){ for(int i=0;i<N;i++){
auto element = PeekIndex<ColourIndex>(Umu,N-1,i); auto element = PeekIndex<ColourIndex>(Umu,N-1,i);
element = element * det; element = element * det;

19
tests/core/Test_reunitarise.cc
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@ -102,7 +102,8 @@ int main (int argc, char ** argv)
LatticeComplexD detUU(grid); LatticeComplexD detUU(grid);
detU= Determinant(U) ; detU= Determinant(U) ;
std::cout << "Determinant before screw up " <<detU<<std::endl; detU=detU-1.0;
std::cout << "Determinant before screw up " << norm2(detU)<<std::endl;
std::cout << " Screwing up determinant " << std::endl; std::cout << " Screwing up determinant " << std::endl;
@ -116,18 +117,24 @@ int main (int argc, char ** argv)
UU=U; UU=U;
detU= Determinant(U) ; detU= Determinant(U) ;
std::cout << "Determinant after screw up " <<detU<<std::endl; detU=detU-1.0;
std::cout << "Determinant defect before projection " <<norm2(detU)<<std::endl;
tmp = U*adj(U) - ident;
std::cout << "Unitarity check before projection " << norm2(tmp)<<std::endl;
ProjectSU3(U); ProjectSU3(U);
detU= Determinant(U) ; detU= Determinant(U) ;
std::cout << "Determinant ProjectSU3 " <<detU<<std::endl;
detU= detU -1.0; detU= detU -1.0;
std::cout << "Determinant ProjectSU3 defect " <<norm2(detU)<<std::endl; std::cout << "Determinant ProjectSU3 defect " <<norm2(detU)<<std::endl;
tmp = U*adj(U) - ident;
std::cout << "Unitarity check after projection " << norm2(tmp)<<std::endl;
ProjectSUn<3>(UU); ProjectSUn(UU);
detUU= Determinant(UU); detUU= Determinant(UU);
std::cout << "Determinant ProjectSUn " <<detUU<<std::endl; detUU= detUU -1.0;
std::cout << "Determinant ProjectSUn defect " <<norm2(detUU)<<std::endl; std::cout << "Determinant ProjectSUn defect " <<norm2(detUU)<<std::endl;
tmp = UU*adj(UU) - ident;
std::cout << "Unitarity check after projection " << norm2(tmp)<<std::endl;
Grid_finalize(); Grid_finalize();
} }