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Merge pull request #473 from UCL-ARC/gauge_action_deriv

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WilsonGagueAction deriv
This commit is contained in:
Peter Boyle
2025-04-24 14:39:10 -04:00
committed by GitHub
parent c545bd2139 e465fce201
commit ab3de50d5e
6 changed files with 43 additions and 42 deletions
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Grid/qcd/action/gauge/PlaqPlusRectangleAction.h
+8 -8
View File
@@ -76,27 +76,27 @@ public:
return action;
};
virtual void deriv(const GaugeField &Umu,GaugeField & dSdU) {
virtual void deriv(const GaugeField &U, GaugeField &dSdU) {
//extend Ta to include Lorentz indexes
RealD factor_p = c_plaq/RealD(Nc)*0.5;
RealD factor_r = c_rect/RealD(Nc)*0.5;
GridBase *grid = Umu.Grid();
GridBase *grid = U.Grid();
std::vector<GaugeLinkField> U (Nd,grid);
std::vector<GaugeLinkField> Umu (Nd,grid);
for(int mu=0;mu<Nd;mu++){
U[mu] = PeekIndex<LorentzIndex>(Umu,mu);
Umu[mu] = PeekIndex<LorentzIndex>(U,mu);
}
std::vector<GaugeLinkField> RectStaple(Nd,grid), Staple(Nd,grid);
WilsonLoops<Gimpl>::StapleAndRectStapleAll(Staple, RectStaple, U, workspace);
WilsonLoops<Gimpl>::StapleAndRectStapleAll(Staple, RectStaple, Umu, workspace);
GaugeLinkField dSdU_mu(grid);
GaugeLinkField staple(grid);
for (int mu=0; mu < Nd; mu++){
dSdU_mu = Ta(U[mu]*Staple[mu])*factor_p;
dSdU_mu = dSdU_mu + Ta(U[mu]*RectStaple[mu])*factor_r;
dSdU_mu = Ta(Umu[mu]*Staple[mu])*factor_p;
dSdU_mu = dSdU_mu + Ta(Umu[mu]*RectStaple[mu])*factor_r;
PokeIndex<LorentzIndex>(dSdU, dSdU_mu, mu);
}
Grid/qcd/action/gauge/WilsonGaugeAction.h
+10 -7
View File
@@ -73,20 +73,23 @@ public:
// extend Ta to include Lorentz indexes
RealD factor = 0.5 * beta / RealD(Nc);
GridBase *grid = U.Grid();
GaugeLinkField Umu(U.Grid());
GaugeLinkField dSdU_mu(U.Grid());
GaugeLinkField dSdU_mu(grid);
std::vector<GaugeLinkField> Umu(Nd, grid);
for (int mu = 0; mu < Nd; mu++) {
Umu[mu] = PeekIndex<LorentzIndex>(U, mu);
}
Umu = PeekIndex<LorentzIndex>(U, mu);
for (int mu = 0; mu < Nd; mu++) {
// Staple in direction mu
WilsonLoops<Gimpl>::Staple(dSdU_mu, U, mu);
dSdU_mu = Ta(Umu * dSdU_mu) * factor;
WilsonLoops<Gimpl>::Staple(dSdU_mu, Umu, mu);
dSdU_mu = Ta(Umu[mu] * dSdU_mu) * factor;
PokeIndex<LorentzIndex>(dSdU, dSdU_mu, mu);
}
}
private:
RealD beta;
};