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gamma matrices as input

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This commit is contained in:
Felix Erben 2019-07-18 17:46:43 +01:00
parent 9d82855c5d
commit 56cefadf9b
2 changed files with 27 additions and 6 deletions
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13
Grid/qcd/utils/BaryonUtils.h
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@ -24,6 +24,8 @@ public:
static void ContractBaryons(const PropagatorField &q1, static void ContractBaryons(const PropagatorField &q1,
const PropagatorField &q2, const PropagatorField &q2,
const PropagatorField &q3, const PropagatorField &q3,
const Gamma GammaA,
const Gamma GammaB,
ComplexField &baryon_corr); ComplexField &baryon_corr);
}; };
@ -33,19 +35,22 @@ template<class FImpl>
void BaryonUtils<FImpl>::ContractBaryons(const PropagatorField &q1, void BaryonUtils<FImpl>::ContractBaryons(const PropagatorField &q1,
const PropagatorField &q2, const PropagatorField &q2,
const PropagatorField &q3, const PropagatorField &q3,
const Gamma GammaA,
const Gamma GammaB,
ComplexField &baryon_corr) ComplexField &baryon_corr)
{ {
GridBase *grid = q1._grid; GridBase *grid = q1._grid;
// C = i gamma_2 gamma_4 => C gamma_5 = - i gamma_1 gamma_3 // C = i gamma_2 gamma_4 => C gamma_5 = - i gamma_1 gamma_3
Gamma GammaA(Gamma::Algebra::Identity); //Still hardcoded 1 //Gamma GammaA(Gamma::Algebra::Identity); //Still hardcoded 1
Gamma GammaB(Gamma::Algebra::SigmaXZ); //Still hardcoded Cg5 //Gamma GammaB(Gamma::Algebra::SigmaXZ); //Still hardcoded Cg5
//Gamma GammaB(Gamma::Algebra::GammaZGamma5); //Still hardcoded CgX = i gamma_3 gamma_5
Gamma g4(Gamma::Algebra::GammaT); //needed for parity P_\pm = 0.5*(1 \pm \gamma_4) Gamma g4(Gamma::Algebra::GammaT); //needed for parity P_\pm = 0.5*(1 \pm \gamma_4)
std::vector<std::vector<int>> epsilon = {{0,1,2},{1,2,0},{2,0,1},{0,2,1},{2,1,0},{1,0,2}}; std::vector<std::vector<int>> epsilon = {{0,1,2},{1,2,0},{2,0,1},{0,2,1},{2,1,0},{1,0,2}};
std::vector<int> epsilon_sgn = {1,1,1,-1,-1,-1}; std::vector<int> epsilon_sgn = {1,1,1,-1,-1,-1};
char left[] = "uud"; char left[] = "sss";
char right[] = "uud"; char right[] = "sss";
std::vector<int> wick_contraction = {0,0,0,0,0,0}; std::vector<int> wick_contraction = {0,0,0,0,0,0};
for (int ie=0; ie < 6 ; ie++) for (int ie=0; ie < 6 ; ie++)

20
Hadrons/Modules/MContraction/Baryon.hpp
View File

@ -49,6 +49,7 @@ public:
std::string, q1, std::string, q1,
std::string, q2, std::string, q2,
std::string, q3, std::string, q3,
std::string, gamma,
std::string, output); std::string, output);
}; };
@ -132,7 +133,7 @@ void TBaryon<FImpl1, FImpl2, FImpl3>::execute(void)
Result result; Result result;
int nt = env().getDim(Tp); int nt = env().getDim(Tp);
result.corr.resize(nt); result.corr.resize(nt);
const std::string gamma{ par().gamma };
std::vector<TComplex> buf; std::vector<TComplex> buf;
// C = i gamma_2 gamma_4 => C gamma_5 = - i gamma_1 gamma_3 // C = i gamma_2 gamma_4 => C gamma_5 = - i gamma_1 gamma_3
/* Gamma GammaA(Gamma::Algebra::Identity); //Still hardcoded 1 /* Gamma GammaA(Gamma::Algebra::Identity); //Still hardcoded 1
@ -213,7 +214,22 @@ void TBaryon<FImpl1, FImpl2, FImpl3>::execute(void)
} }
*/ */
BaryonUtils<FIMPL>::ContractBaryons(q1,q2,q3,c); Gamma GammaA(Gamma::Algebra::Identity);
Gamma GammaB(Gamma::Algebra::SigmaXZ); //Still hardcoded Cg5
if (gamma.compare("X") ==0){
std::cout << "using interpolator C gamma_X";
Gamma GammaB(Gamma::Algebra::GammaZGamma5); //Still hardcoded CgX = i gamma_3 gamma_5
}
if (gamma.compare("Y") ==0){
std::cout << "using interpolator C gamma_Y";
Gamma GammaB(Gamma::Algebra::GammaT); //Still hardcoded CgX = - gamma_4
}
if (gamma.compare("Z")==0){
std::cout << "using interpolator C gamma_Z";
Gamma GammaB(Gamma::Algebra::GammaXGamma5); //Still hardcoded CgX = i gamma_1 gamma_5
}
BaryonUtils<FIMPL>::ContractBaryons(q1,q2,q3,GammaA,GammaB,c);
sliceSum(c,buf,Tp); sliceSum(c,buf,Tp);