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Adding some documentation for HMC

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This commit is contained in:
Guido Cossu
2016-10-19 10:51:13 +01:00
parent 79270ef510
commit 74f1ed3bc5
7 changed files with 531 additions and 70 deletions
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47
lib/qcd/utils/WilsonLoops.h
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@@ -86,8 +86,7 @@ public:
// sum over all x,y,z,t and over all planes of plaquette
//////////////////////////////////////////////////
static RealD sumPlaquette(const GaugeLorentz &Umu) {
std::vector<GaugeMat> U(4, Umu._grid);
std::vector<GaugeMat> U(Nd, Umu._grid);
for (int mu = 0; mu < Nd; mu++) {
U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
}
@@ -95,11 +94,12 @@ public:
LatticeComplex Plaq(Umu._grid);
sitePlaquette(Plaq, U);
TComplex Tp = sum(Plaq);
Complex p = TensorRemove(Tp);
return p.real();
}
//////////////////////////////////////////////////
// average over all x,y,z,t and over all planes of plaquette
//////////////////////////////////////////////////
@@ -114,7 +114,7 @@ public:
// average over traced single links
//////////////////////////////////////////////////
static RealD linkTrace(const GaugeLorentz &Umu) {
std::vector<GaugeMat> U(4, Umu._grid);
std::vector<GaugeMat> U(Nd, Umu._grid);
LatticeComplex Tr(Umu._grid);
Tr = zero;
@@ -139,7 +139,7 @@ public:
GridBase *grid = Umu._grid;
std::vector<GaugeMat> U(4, grid);
std::vector<GaugeMat> U(Nd, grid);
for (int d = 0; d < Nd; d++) {
U[d] = PeekIndex<LorentzIndex>(Umu, d);
}
@@ -233,7 +233,7 @@ public:
if (nu != mu) {
GridBase *grid = Umu._grid;
std::vector<GaugeMat> U(4, grid);
std::vector<GaugeMat> U(Nd, grid);
for (int d = 0; d < Nd; d++) {
U[d] = PeekIndex<LorentzIndex>(Umu, d);
}
@@ -256,6 +256,37 @@ public:
}
}
//////////////////////////////////////////////////
// the sum over all staples on each site in direction mu,nu, lower part
//////////////////////////////////////////////////
static void StapleLower(GaugeMat &staple, const GaugeLorentz &Umu, int mu,
int nu) {
staple = zero;
if (nu != mu) {
GridBase *grid = Umu._grid;
std::vector<GaugeMat> U(Nd, grid);
for (int d = 0; d < Nd; d++) {
U[d] = PeekIndex<LorentzIndex>(Umu, d);
}
// mu
// ^
// |__> nu
// __
// |
// |__
//
//
staple += Gimpl::ShiftStaple(
Gimpl::CovShiftBackward(U[nu], nu,
Gimpl::CovShiftBackward(U[mu], mu, U[nu])),
mu);
}
}
//////////////////////////////////////////////////////
// Similar to above for rectangle is required
//////////////////////////////////////////////////////
@@ -375,8 +406,8 @@ public:
// |___ ___|
//
// tmp= Staple2x1* Cshift(U[mu],mu,-2);
// Stap+= Cshift(tmp,mu,1) ;
// tmp= Staple2x1* Cshift(U[mu],mu,-2);
// Stap+= Cshift(tmp,mu,1) ;
Stap += Cshift(Staple2x1, mu, 1) * Cshift(U[mu], mu, -1);
;