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ferben 2020-05-07 18:03:17 +01:00
parent a887206413
commit 253bcc3426
1 changed files with 105 additions and 144 deletions
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189
Grid/qcd/utils/BaryonUtils.h
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@ -46,11 +46,11 @@ public:
typedef typename SpinMatrixField::vector_object sobj; typedef typename SpinMatrixField::vector_object sobj;
static const int epsilon[6][3] ; static const int epsilon[6][3] ;
static const double epsilon_sgn[6]; static const Complex epsilon_sgn[6];
private: private:
template <class mobj, class robj> template <class mobj, class robj>
static inline void baryon_site(unsigned int mask, const mobj &D1, static void baryon_site(const mobj &D1,
const mobj &D2, const mobj &D2,
const mobj &D3, const mobj &D3,
const Gamma GammaA_left, const Gamma GammaA_left,
@ -58,32 +58,8 @@ public:
const Gamma GammaA_right, const Gamma GammaA_right,
const Gamma GammaB_right, const Gamma GammaB_right,
const int parity, const int parity,
const int * wick_contractions,
robj &result); robj &result);
template <unsigned int mask, class mobj, class robj>
static inline void baryon_site(const mobj &D1,
const mobj &D2,
const mobj &D3,
const Gamma GammaA_left,
const Gamma GammaB_left,
const Gamma GammaA_right,
const Gamma GammaB_right,
const int parity,
robj &result);
template <unsigned int maxMask>
struct BaryonSiteHelper
{
template <class mobj, class robj>
static inline void function(const unsigned int mask, const mobj &D1,
const mobj &D2,
const mobj &D3,
const Gamma GammaA_left,
const Gamma GammaB_left,
const Gamma GammaA_right,
const Gamma GammaB_right,
const int parity,
robj &result);
};
public: public:
static void ContractBaryons(const PropagatorField &q1_left, static void ContractBaryons(const PropagatorField &q1_left,
const PropagatorField &q2_left, const PropagatorField &q2_left,
@ -176,11 +152,17 @@ public:
template <class FImpl> template <class FImpl>
const int BaryonUtils<FImpl>::epsilon[6][3] = {{0,1,2},{1,2,0},{2,0,1},{0,2,1},{2,1,0},{1,0,2}}; const int BaryonUtils<FImpl>::epsilon[6][3] = {{0,1,2},{1,2,0},{2,0,1},{0,2,1},{2,1,0},{1,0,2}};
template <class FImpl> template <class FImpl>
const double BaryonUtils<FImpl>::epsilon_sgn[6] = {1.0,1.0,1.0,-1.0,-1.0,-1.0}; const Complex BaryonUtils<FImpl>::epsilon_sgn[6] = {Complex(1),
Complex(1),
Complex(1),
Complex(-1),
Complex(-1),
Complex(-1)};
//This is the old version
template <class FImpl> template <class FImpl>
template <unsigned int mask, class mobj, class robj> template <class mobj, class robj>
inline void BaryonUtils<FImpl>::baryon_site(const mobj &D1, void BaryonUtils<FImpl>::baryon_site(const mobj &D1,
const mobj &D2, const mobj &D2,
const mobj &D3, const mobj &D3,
const Gamma GammaA_left, const Gamma GammaA_left,
@ -188,14 +170,9 @@ inline void BaryonUtils<FImpl>::baryon_site(const mobj &D1,
const Gamma GammaA_right, const Gamma GammaA_right,
const Gamma GammaB_right, const Gamma GammaB_right,
const int parity, const int parity,
const int * wick_contraction,
robj &result) robj &result)
{ {
constexpr bool wick_contraction_0 = ((mask & (1 << 5)) >> 5);
constexpr bool wick_contraction_1 = ((mask & (1 << 4)) >> 4);
constexpr bool wick_contraction_2 = ((mask & (1 << 3)) >> 3);
constexpr bool wick_contraction_3 = ((mask & (1 << 2)) >> 2);
constexpr bool wick_contraction_4 = ((mask & (1 << 1)) >> 1);
constexpr bool wick_contraction_5 = ((mask & (1 << 0)) >> 0);
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)
@ -216,84 +193,77 @@ inline void BaryonUtils<FImpl>::baryon_site(const mobj &D1,
int a_right = epsilon[ie_right][0]; //a' int a_right = epsilon[ie_right][0]; //a'
int b_right = epsilon[ie_right][1]; //b' int b_right = epsilon[ie_right][1]; //b'
int c_right = epsilon[ie_right][2]; //c' int c_right = epsilon[ie_right][2]; //c'
double ee = epsilon_sgn[ie_left] * epsilon_sgn[ie_right]; Complex ee = epsilon_sgn[ie_left] * epsilon_sgn[ie_right];
//All parts together //This is the \delta_{456}^{123} part
if (wick_contraction[0]){
for (int gamma_left=0; gamma_left<Ns; gamma_left++){ for (int gamma_left=0; gamma_left<Ns; gamma_left++){
auto eepD1 = ee * pD1()(gamma_left,gamma_left)(c_right,c_left); auto eepD1 = ee * pD1()(gamma_left,gamma_left)(c_right,c_left);
for (int alpha_right=0; alpha_right<Ns; alpha_right++){
for (int beta_left=0; beta_left<Ns; beta_left++){
auto D2g_ab = D2g()(alpha_right,beta_left)(a_right,a_left);
auto gD3_ab = gD3()(alpha_right,beta_left)(b_right,b_left);
result()()() += eepD1*D2g_ab*gD3_ab;
}}}
}
//This is the \delta_{456}^{231} part
if (wick_contraction[1]){
for (int gamma_left=0; gamma_left<Ns; gamma_left++){
for (int alpha_right=0; alpha_right<Ns; alpha_right++){ for (int alpha_right=0; alpha_right<Ns; alpha_right++){
auto gD3_ag = gD3()(alpha_right,gamma_left)(b_right,c_left); auto gD3_ag = gD3()(alpha_right,gamma_left)(b_right,c_left);
for (int beta_left=0; beta_left<Ns; beta_left++){
auto eepD1g_gb = ee * pD1g()(gamma_left,beta_left)(c_right,a_left);
auto D2_ab = D2()(alpha_right,beta_left)(a_right,b_left);
result()()() += eepD1g_gb*D2_ab*gD3_ag;
}}}
}
//This is the \delta_{456}^{312} part
if (wick_contraction[2]){
for (int gamma_left=0; gamma_left<Ns; gamma_left++){
for (int alpha_right=0; alpha_right<Ns; alpha_right++){
auto D2_ag = D2()(alpha_right,gamma_left)(a_right,c_left);
for (int beta_left=0; beta_left<Ns; beta_left++){
auto eepD1_gb = ee * pD1()(gamma_left,beta_left)(c_right,b_left);
auto gD3g_ab = gD3g()(alpha_right,beta_left)(b_right,a_left);
result()()() += eepD1_gb*D2_ag*gD3g_ab;
}}}
}
//This is the \delta_{456}^{132} part
if (wick_contraction[3]){
for (int gamma_left=0; gamma_left<Ns; gamma_left++){
auto eepD1 = ee * pD1()(gamma_left,gamma_left)(c_right,c_left);
for (int alpha_right=0; alpha_right<Ns; alpha_right++){
for (int beta_left=0; beta_left<Ns; beta_left++){
auto D2_ab = D2()(alpha_right,beta_left)(a_right,b_left);
auto gD3g_ab = gD3g()(alpha_right,beta_left)(b_right,a_left);
result()()() -= eepD1*D2_ab*gD3g_ab;
}}}
}
//This is the \delta_{456}^{321} part
if (wick_contraction[4]){
for (int gamma_left=0; gamma_left<Ns; gamma_left++){
for (int alpha_right=0; alpha_right<Ns; alpha_right++){
auto gD3_ag = gD3()(alpha_right,gamma_left)(b_right,c_left);
for (int beta_left=0; beta_left<Ns; beta_left++){
auto eepD1_gb = ee * pD1()(gamma_left,beta_left)(c_right,b_left);
auto D2g_ab = D2g()(alpha_right,beta_left)(a_right,a_left);
result()()() -= eepD1_gb*D2g_ab*gD3_ag;
}}}
}
//This is the \delta_{456}^{213} part
if (wick_contraction[5]){
for (int gamma_left=0; gamma_left<Ns; gamma_left++){
for (int alpha_right=0; alpha_right<Ns; alpha_right++){
auto D2_ag = D2()(alpha_right,gamma_left)(a_right,c_left); auto D2_ag = D2()(alpha_right,gamma_left)(a_right,c_left);
for (int beta_left=0; beta_left<Ns; beta_left++){ for (int beta_left=0; beta_left<Ns; beta_left++){
auto eepD1g_gb = ee * pD1g()(gamma_left,beta_left)(c_right,a_left); auto eepD1g_gb = ee * pD1g()(gamma_left,beta_left)(c_right,a_left);
auto eepD1_gb = ee * pD1()(gamma_left,beta_left)(c_right,b_left);
auto D2g_ab = D2g()(alpha_right,beta_left)(a_right,a_left);
auto D2_ab = D2()(alpha_right,beta_left)(a_right,b_left);
auto gD3_ab = gD3()(alpha_right,beta_left)(b_right,b_left); auto gD3_ab = gD3()(alpha_right,beta_left)(b_right,b_left);
auto gD3g_ab = gD3g()(alpha_right,beta_left)(b_right,a_left);
if(wick_contraction_0){
result()()() += eepD1*D2g_ab*gD3_ab;
}
if(wick_contraction_1){
result()()() += eepD1g_gb*D2_ab*gD3_ag;
}
if(wick_contraction_2){
result()()() += eepD1_gb*D2_ag*gD3g_ab;
}
if(wick_contraction_3){
result()()() -= eepD1*D2_ab*gD3g_ab;
}
if(wick_contraction_4){
result()()() -= eepD1_gb*D2g_ab*gD3_ag;
}
if(wick_contraction_5){
result()()() -= eepD1g_gb*D2_ag*gD3_ab; result()()() -= eepD1g_gb*D2_ag*gD3_ab;
}
}}} }}}
} }
} }
}
template <class FImpl>
template <unsigned int maxMask>
template <class mobj, class robj>
inline void BaryonUtils<FImpl>::BaryonSiteHelper<maxMask>::function(const unsigned int mask, const mobj &D1,
const mobj &D2,
const mobj &D3,
const Gamma GammaA_left,
const Gamma GammaB_left,
const Gamma GammaA_right,
const Gamma GammaB_right,
const int parity,
robj &result)
{
assert(mask <= maxMask);
if (mask == maxMask)
{
baryon_site<maxMask,decltype(D1),decltype(result)>(D1, D2, D3, GammaA_left, GammaB_left, GammaA_right, GammaB_right, parity, result);
}
else
{
BaryonSiteHelper<(maxMask>0) ? maxMask-1 : 0>::function(mask, D1, D2, D3, GammaA_left, GammaB_left, GammaA_right, GammaB_right, parity, result);
} }
} }
// top-level function
template <class FImpl>
template <class mobj, class robj>
inline void BaryonUtils<FImpl>::baryon_site(const unsigned int mask, const mobj &D1,
const mobj &D2,
const mobj &D3,
const Gamma GammaA_left,
const Gamma GammaB_left,
const Gamma GammaA_right,
const Gamma GammaB_right,
const int parity,
robj &result)
{
BaryonSiteHelper<63>::function(mask, D1, D2, D3, GammaA_left, GammaB_left, GammaA_right, GammaB_right, parity, result);
}
template<class FImpl> template<class FImpl>
void BaryonUtils<FImpl>::ContractBaryons(const PropagatorField &q1_left, void BaryonUtils<FImpl>::ContractBaryons(const PropagatorField &q1_left,
const PropagatorField &q2_left, const PropagatorField &q2_left,
@ -321,9 +291,9 @@ void BaryonUtils<FImpl>::ContractBaryons(const PropagatorField &q1_left,
GridBase *grid = q1_left.Grid(); GridBase *grid = q1_left.Grid();
int wick_id; int wick_contraction[6];
for (int ie=0; ie < 6 ; ie++) for (int ie=0; ie < 6 ; ie++)
wick_id = ((quarks_left[0] == quarks_right[epsilon[ie][0]] && quarks_left[1] == quarks_right[epsilon[ie][1]] && quarks_left[2] == quarks_right[epsilon[ie][2]]) ? 1 : 0) << (5-ie); wick_contraction[ie] = (quarks_left[0] == quarks_right[epsilon[ie][0]] && quarks_left[1] == quarks_right[epsilon[ie][1]] && quarks_left[2] == quarks_right[epsilon[ie][2]]) ? 1 : 0;
auto vbaryon_corr= baryon_corr.View(); auto vbaryon_corr= baryon_corr.View();
auto v1 = q1_left.View(); auto v1 = q1_left.View();
@ -339,10 +309,9 @@ void BaryonUtils<FImpl>::ContractBaryons(const PropagatorField &q1_left,
auto D3 = v3[ss]; auto D3 = v3[ss];
vobj result=Zero(); vobj result=Zero();
baryon_site(wick_id,D1,D2,D3,GammaA_left,GammaB_left,GammaA_right,GammaB_right,parity,result); baryon_site(D1,D2,D3,GammaA_left,GammaB_left,GammaA_right,GammaB_right,parity,wick_contraction,result);
vbaryon_corr[ss] = result; vbaryon_corr[ss] = result;
} );//end loop over lattice sites } );//end loop over lattice sites
} }
template <class FImpl> template <class FImpl>
template <class mobj, class robj> template <class mobj, class robj>
@ -370,12 +339,12 @@ void BaryonUtils<FImpl>::ContractBaryons_Sliced(const mobj &D1,
assert(parity==1 || parity == -1 && "Parity must be +1 or -1"); assert(parity==1 || parity == -1 && "Parity must be +1 or -1");
int wick_id; int wick_contraction[6];
for (int ie=0; ie < 6 ; ie++) for (int ie=0; ie < 6 ; ie++)
wick_id = ((quarks_left[0] == quarks_right[epsilon[ie][0]] && quarks_left[1] == quarks_right[epsilon[ie][1]] && quarks_left[2] == quarks_right[epsilon[ie][2]]) ? 1 : 0) << (5-ie); wick_contraction[ie] = (quarks_left[0] == quarks_right[epsilon[ie][0]] && quarks_left[1] == quarks_right[epsilon[ie][1]] && quarks_left[2] == quarks_right[epsilon[ie][2]]) ? 1 : 0;
result=Zero(); result=Zero();
baryon_site(wick_id,D1,D2,D3,GammaA_left,GammaB_left,GammaA_right,GammaB_right,parity,result); baryon_site<decltype(D1),decltype(result)>(D1,D2,D3,GammaA_left,GammaB_left,GammaA_right,GammaB_right,parity,wick_contraction,result);
} }
/*********************************************************************** /***********************************************************************
@ -615,10 +584,6 @@ void BaryonUtils<FImpl>::Sigma_to_Nucleon_Eye(const PropagatorField &qq_loop,
const std::string op, const std::string op,
SpinMatrixField &stn_corr) SpinMatrixField &stn_corr)
{ {
assert(Ns==4 && "Baryon code only implemented for N_spin = 4");
assert(Nc==3 && "Baryon code only implemented for N_colour = 3");
GridBase *grid = qs_ti.Grid(); GridBase *grid = qs_ti.Grid();
auto vcorr= stn_corr.View(); auto vcorr= stn_corr.View();
@ -656,10 +621,6 @@ void BaryonUtils<FImpl>::Sigma_to_Nucleon_NonEye(const PropagatorField &qq_ti,
const std::string op, const std::string op,
SpinMatrixField &stn_corr) SpinMatrixField &stn_corr)
{ {
assert(Ns==4 && "Baryon code only implemented for N_spin = 4");
assert(Nc==3 && "Baryon code only implemented for N_colour = 3");
GridBase *grid = qs_ti.Grid(); GridBase *grid = qs_ti.Grid();
auto vcorr= stn_corr.View(); auto vcorr= stn_corr.View();