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Auxiliary fields

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This commit is contained in:
Guido Cossu
2017-02-27 13:16:38 +00:00
parent 7270c6a150
commit 596dcd85b2
7 changed files with 146 additions and 20 deletions
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37
lib/qcd/hmc/integrators/Integrator.h
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@ -128,17 +128,23 @@ class Integrator {
Mom -= force * ep;
}
// Generalised momenta
MomentaField MomDer(P.Mom._grid);
P.M.ImportGauge(U);
P.DerivativeU(P.Mom, MomDer);
Mom -= MomDer * ep;
// Auxiliary fields
//P.update_auxiliary_momenta(ep*0.5);
//P.AuxiliaryFieldsDerivative(MomDer);
//Mom -= MomDer * ep;
//P.update_auxiliary_momenta(ep*0.5);
// Force from the other representations
as[level].apply(update_P_hireps, Representations, Mom, U, ep);
}
void implicit_update_P(Field& U, int level, double ep) {
void implicit_update_P(Field& U, int level, double ep, bool intermediate = false) {
t_P[level] += ep;
std::cout << GridLogIntegrator << "[" << level << "] P "
@ -170,16 +176,18 @@ class Integrator {
P.M.ImportGauge(U);
MomentaField MomDer(P.Mom._grid);
MomentaField MomDer1(P.Mom._grid);
MomentaField AuxDer(P.Mom._grid);
MomDer1 = zero;
MomentaField diff(P.Mom._grid);
// be careful here, we need the first step
// in every trajectory
static int call = 0;
if (call == 1)
if (intermediate)
P.DerivativeU(P.Mom, MomDer1);
call = 1;
// Auxiliary fields
//P.update_auxiliary_momenta(ep*0.5);
//P.AuxiliaryFieldsDerivative(AuxDer);
//Msum += AuxDer;
// Here run recursively
int counter = 1;
@ -194,7 +202,7 @@ class Integrator {
std::cout << GridLogIntegrator << "|Force| laplacian site average: " << force_abs
<< std::endl;
NewMom = P.Mom - ep* 0.5 * (2.0*Msum + MomDer + MomDer1);
NewMom = P.Mom - ep* 0.5 * (2.0*Msum + MomDer + MomDer1);// simplify
diff = NewMom - OldMom;
counter++;
RelativeError = std::sqrt(norm2(diff))/std::sqrt(norm2(NewMom));
@ -204,8 +212,8 @@ class Integrator {
P.Mom = NewMom;
// update the auxiliary fields momenta
// todo
// update the auxiliary fields momenta
//P.update_auxiliary_momenta(ep*0.5);
}
@ -239,7 +247,7 @@ class Integrator {
Field diff(U._grid);
Real threshold = 1e-6;
int counter = 1;
int MaxCounter = 1000;
int MaxCounter = 100;
Field OldU = U;
Field NewU = U;
@ -247,6 +255,10 @@ class Integrator {
P.M.ImportGauge(U);
P.DerivativeP(Mom1); // first term in the derivative
//P.update_auxiliary_fields(ep*0.5);
do {
std::cout << GridLogIntegrator << "UpdateU implicit step "<< counter << std::endl;
@ -271,6 +283,9 @@ class Integrator {
} while (RelativeError > threshold && counter < MaxCounter);
U = NewU;
//P.update_auxiliary_fields(ep*0.5);
}

2
lib/qcd/hmc/integrators/Integrator_algorithm.h
View File

@ -344,7 +344,7 @@ class ImplicitLeapFrog : public Integrator<FieldImplementation, SmearingPolicy,
if (last_step){
this->update_P(U, level, eps / 2.0);
} else {
this->implicit_update_P(U, level, eps);
this->implicit_update_P(U, level, eps, true);// intermediate step
}
}
}