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Meson module now takes list of gamma matrices to insert at source and sink.

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This commit is contained in:
Lanny91
2017-01-19 22:18:42 +00:00
parent 8ae1a95ec6
commit 07f2ebea1b
3 changed files with 116 additions and 14 deletions
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112
extras/Hadrons/Modules/MContraction/Meson.hpp
View File

@@ -8,6 +8,7 @@ Copyright (C) 2015
Copyright (C) 2016
Author: Antonin Portelli <antonin.portelli@me.com>
Andrew Lawson <andrew.lawson1991@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -36,6 +37,22 @@ See the full license in the file "LICENSE" in the top level distribution directo
BEGIN_HADRONS_NAMESPACE
/*
Meson contractions
-----------------------------
* options:
- q1: input propagator 1 (string)
- q2: input propagator 2 (string)
- gammas: gamma products to insert at source & sink, pairs of gamma matrices
(space-separated integers) in square brackets, in a sequence
(e.g. "[15 7][7 15][7 7]").
Special values: "all" - perform all possible contractions.
*/
/******************************************************************************
* TMeson *
******************************************************************************/
@@ -47,6 +64,7 @@ public:
GRID_SERIALIZABLE_CLASS_MEMBERS(MesonPar,
std::string, q1,
std::string, q2,
std::string, gammas,
std::string, output);
};
@@ -70,6 +88,10 @@ public:
// dependencies/products
virtual std::vector<std::string> getInput(void);
virtual std::vector<std::string> getOutput(void);
virtual void parseGammaString(SpinMatrix*,
unsigned int &,
unsigned int &,
std::vector<std::vector<bool>> &);
// execution
virtual void execute(void);
};
@@ -102,6 +124,79 @@ std::vector<std::string> TMeson<FImpl1, FImpl2>::getOutput(void)
return output;
}
template <typename T>
std::vector<std::pair<T, T>> strToVecPair(const std::string s)
{
std::vector<std::pair<T, T>> v;
return v;
}
template <typename FImpl1, typename FImpl2>
void TMeson<FImpl1, FImpl2>::parseGammaString(SpinMatrix *g,
unsigned int &n_snk,
unsigned int &n_src,
std::vector<std::vector<bool>> &toDo)
{
// Initialise counters for parsing gamma insertions at source & sink.
int empty = -1;
std::vector<int> gamma_inds(Ns*Ns, empty);
unsigned int n_gam = 0;
// Determine gamma matrices to insert at source/sink.
if (par().gammas.compare("all") == 0)
{
// Do all contractions.
toDo.resize(Ns*Ns);
for (int i = 0; i < Ns*Ns; ++i)
{
g[i] = makeGammaProd(i);
toDo[i].assign(Ns*Ns, true);
}
}
else
{
// Parse individual contractions from input string.
std::vector<std::pair<int, int>> gamma_pairs;
gamma_pairs = strToVecPair<int>(par().gammas);
// Function for gamma matrix counting & indexing at source/sink.
auto index_gamma = [&empty, &g, &gamma_inds, &n_gam](int i,
unsigned int &n)
{
if (i >= gamma_inds.size())
{
HADRON_ERROR("Invalid gamma matrix index " << i);
}
if (gamma_inds[i] == empty)
{
g[n_gam] = makeGammaProd(i);
gamma_inds[i] = n_gam;
++n_gam;
++n;
}
};
// Count no. of unique gamma matrices, then construct matrix of
// contractions to do.
for (unsigned int i = 0; i < gamma_inds.size(); ++i)
{
index_gamma(gamma_pairs[i].first, n_snk);
index_gamma(gamma_pairs[i].second, n_src);
}
toDo.resize(n_gam);
for (int i = 0; i < n_gam; ++i)
{
toDo[i].assign(n_gam, false);
}
for (int i = 0; i < gamma_inds.size(); ++i)
{
toDo[gamma_inds[gamma_pairs[i].first]]
[gamma_inds[gamma_pairs[i].second]] = true;
}
}
}
// execution ///////////////////////////////////////////////////////////////////
template <typename FImpl1, typename FImpl2>
void TMeson<FImpl1, FImpl2>::execute(void)
@@ -115,19 +210,21 @@ void TMeson<FImpl1, FImpl2>::execute(void)
PropagatorField2 &q2 = *env().template getObject<PropagatorField2>(par().q2);
LatticeComplex c(env().getGrid());
SpinMatrix g[Ns*Ns], g5;
std::vector<std::vector<bool>> toDo;
std::vector<TComplex> buf;
Result result;
unsigned int n_snk, n_src;
g5 = makeGammaProd(Ns*Ns - 1);
result.corr.resize(Ns*Ns);
for (unsigned int i = 0; i < Ns*Ns; ++i)
parseGammaString(g, n_snk, n_src, toDo);
result.corr.resize(n_snk);
for (unsigned int iSink = 0; iSink < toDo.size(); ++iSink)
{
g[i] = makeGammaProd(i);
}
for (unsigned int iSink = 0; iSink < Ns*Ns; ++iSink)
result.corr[iSink].resize(n_src);
for (unsigned int iSrc = 0; iSrc < toDo.size(); ++iSrc)
{
result.corr[iSink].resize(Ns*Ns);
for (unsigned int iSrc = 0; iSrc < Ns*Ns; ++iSrc)
if (toDo[iSink][iSrc])
{
c = trace(g[iSink]*q1*g[iSrc]*g5*adj(q2)*g5);
sliceSum(c, buf, Tp);
@@ -138,6 +235,7 @@ void TMeson<FImpl1, FImpl2>::execute(void)
}
}
}
}
write(writer, "meson", result);
}

2
tests/hadrons/Test_hadrons_meson_3pt.cc
View File

@@ -130,6 +130,7 @@ int main(int argc, char *argv[])
mesPar.output = "mesons/Z2_" + flavour[i] + flavour[j];
mesPar.q1 = qName[i];
mesPar.q2 = qName[j];
mesPar.gammas = "all";
application.createModule<MContraction::Meson>("meson_Z2_"
+ std::to_string(t)
+ "_"
@@ -147,6 +148,7 @@ int main(int argc, char *argv[])
+ std::to_string(mu);
mesPar.q1 = qName[i];
mesPar.q2 = seqName[j][mu];
mesPar.gammas = "all";
application.createModule<MContraction::Meson>("3pt_Z2_"
+ std::to_string(t)
+ "_"

2
tests/hadrons/Test_hadrons_spectrum.cc
View File

@@ -96,12 +96,14 @@ int main(int argc, char *argv[])
mesPar.output = "mesons/pt_" + flavour[i] + flavour[j];
mesPar.q1 = "Qpt_" + flavour[i];
mesPar.q2 = "Qpt_" + flavour[j];
mesPar.gammas = "all";
application.createModule<MContraction::Meson>("meson_pt_"
+ flavour[i] + flavour[j],
mesPar);
mesPar.output = "mesons/Z2_" + flavour[i] + flavour[j];
mesPar.q1 = "QZ2_" + flavour[i];
mesPar.q2 = "QZ2_" + flavour[j];
mesPar.gammas = "all";
application.createModule<MContraction::Meson>("meson_Z2_"
+ flavour[i] + flavour[j],
mesPar);