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Grid/Hadrons/Modules/MContraction/Baryon.hpp

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: Hadrons/Modules/MContraction/Baryon.hpp
Copyright (C) 2015-2019
Author: Antonin Portelli <antonin.portelli@me.com>
Author: Felix Erben <felix.erben@ed.ac.uk>
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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#ifndef Hadrons_MContraction_Baryon_hpp_
#define Hadrons_MContraction_Baryon_hpp_
#include <Hadrons/Global.hpp>
#include <Hadrons/Module.hpp>
#include <Hadrons/ModuleFactory.hpp>
#include <Grid/qcd/utils/BaryonUtils.h>
BEGIN_HADRONS_NAMESPACE
/******************************************************************************
* Baryon *
******************************************************************************/
BEGIN_MODULE_NAMESPACE(MContraction)
typedef std::pair<Gamma::Algebra, Gamma::Algebra> GammaAB;
typedef std::pair<GammaAB, GammaAB> GammaABPair;
class BaryonPar: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(BaryonPar,
std::string, q1,
std::string, q2,
std::string, q3,
std::string, gammas,
std::string, quarks,
std::string, prefactors,
std::string, parity,
std::string, sink,
std::string, output);
};
template <typename FImpl1, typename FImpl2, typename FImpl3>
class TBaryon: public Module<BaryonPar>
{
public:
FERM_TYPE_ALIASES(FImpl1, 1);
FERM_TYPE_ALIASES(FImpl2, 2);
FERM_TYPE_ALIASES(FImpl3, 3);
BASIC_TYPE_ALIASES(ScalarImplCR, Scalar);
SINK_TYPE_ALIASES(Scalar);
class Metadata: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(Metadata,
Gamma::Algebra, gammaA_left,
Gamma::Algebra, gammaB_left,
Gamma::Algebra, gammaA_right,
Gamma::Algebra, gammaB_right,
std::string, quarks,
std::string, prefactors,
int, parity);
};
typedef Correlator<Metadata> Result;
public:
// constructor
TBaryon(const std::string name);
// destructor
virtual ~TBaryon(void) {};
// dependency relation
virtual std::vector<std::string> getInput(void);
virtual std::vector<std::string> getOutput(void);
virtual void parseGammaString(std::vector<GammaABPair> &gammaList);
protected:
// setup
virtual void setup(void);
// execution
virtual void execute(void);
// Which gamma algebra was specified
Gamma::Algebra al;
};
MODULE_REGISTER_TMP(Baryon, ARG(TBaryon<FIMPL, FIMPL, FIMPL>), MContraction);
/******************************************************************************
* TBaryon implementation *
******************************************************************************/
// constructor /////////////////////////////////////////////////////////////////
template <typename FImpl1, typename FImpl2, typename FImpl3>
TBaryon<FImpl1, FImpl2, FImpl3>::TBaryon(const std::string name)
: Module<BaryonPar>(name)
{}
// dependencies/products ///////////////////////////////////////////////////////
template <typename FImpl1, typename FImpl2, typename FImpl3>
std::vector<std::string> TBaryon<FImpl1, FImpl2, FImpl3>::getInput(void)
{
std::vector<std::string> input = {par().q1, par().q2, par().q3, par().sink};
return input;
}
template <typename FImpl1, typename FImpl2, typename FImpl3>
std::vector<std::string> TBaryon<FImpl1, FImpl2, FImpl3>::getOutput(void)
{
std::vector<std::string> out = {};
return out;
}
template <typename FImpl1, typename FImpl2, typename FImpl3>
void TBaryon<FImpl1, FImpl2,FImpl3>::parseGammaString(std::vector<GammaABPair> &gammaList)
{
gammaList.clear();
std::string gammaString = par().gammas;
//Shorthands for standard baryon operators
gammaString = regex_replace(gammaString, std::regex("j12"),"(Identity SigmaXZ)");
gammaString = regex_replace(gammaString, std::regex("j32X"),"(Identity MinusGammaZGamma5)");
gammaString = regex_replace(gammaString, std::regex("j32Y"),"(Identity GammaT)");
gammaString = regex_replace(gammaString, std::regex("j32Z"),"(Identity GammaXGamma5)");
//Shorthands for less common baryon operators
gammaString = regex_replace(gammaString, std::regex("j12_alt1"),"(Gamma5 MinusSigmaYT)");
gammaString = regex_replace(gammaString, std::regex("j12_alt2"),"(Identity GammaYGamma5)");
//A single gamma matrix
std::regex rex_g("([0-9a-zA-Z]+)");
//The full string we expect
std::regex rex("( *\\(( *\\(([0-9a-zA-Z]+) +([0-9a-zA-Z]+) *\\)){2} *\\) *)+");
std::smatch sm;
std::regex_match(gammaString, sm, rex);
assert(sm[0].matched && "invalid gamma structure.");
auto gamma_begin = std::sregex_iterator(gammaString.begin(), gammaString.end(), rex_g);
auto gamma_end = std::sregex_iterator();
int nGamma = std::distance(gamma_begin, gamma_end);
//couldn't find out how to count the size in the iterator, other than looping through it...
/* int nGamma=0;
for (std::sregex_iterator i = gamma_begin; i != gamma_end; ++i) {
nGamma++;
}
*/
gammaList.resize(nGamma/4);
std::vector<std::string> gS;
gS.resize(nGamma);
//even more ugly workarounds here...
int iG=0;
for (std::sregex_iterator i = gamma_begin; i != gamma_end; ++i) {
std::smatch match = *i;
gS[iG] = match.str();
iG++;
}
for (int i = 0; i < gammaList.size(); i++){
std::vector<Gamma::Algebra> gS1 = strToVec<Gamma::Algebra>(gS[4*i]);
std::vector<Gamma::Algebra> gS2 = strToVec<Gamma::Algebra>(gS[4*i+1]);
std::vector<Gamma::Algebra> gS3 = strToVec<Gamma::Algebra>(gS[4*i+2]);
std::vector<Gamma::Algebra> gS4 = strToVec<Gamma::Algebra>(gS[4*i+3]);
gammaList[i].first.first=gS1[0];
gammaList[i].first.second=gS2[0];
gammaList[i].second.first=gS3[0];
gammaList[i].second.second=gS4[0];
}
}
// setup ///////////////////////////////////////////////////////////////////////
template <typename FImpl1, typename FImpl2, typename FImpl3>
void TBaryon<FImpl1, FImpl2, FImpl3>::setup(void)
{
envTmpLat(LatticeComplex, "c");
envTmpLat(LatticeComplex, "c2");
}
// execution ///////////////////////////////////////////////////////////////////
template <typename FImpl1, typename FImpl2, typename FImpl3>
void TBaryon<FImpl1, FImpl2, FImpl3>::execute(void)
{
std::vector<std::string> quarks = strToVec<std::string>(par().quarks);
std::vector<double> prefactors = strToVec<double>(par().prefactors);
int nQ=quarks.size();
const int parity {par().parity.size()>0 ? std::stoi(par().parity) : 1};
std::vector<GammaABPair> gammaList;
parseGammaString(gammaList);
assert(prefactors.size()==nQ && "number of prefactors needs to match number of quark-structures.");
for (int iQ = 0; iQ < nQ; iQ++)
assert(quarks[iQ].size()==3 && "quark-structures must consist of 3 quarks each.");
LOG(Message) << "Computing baryon contractions '" << getName() << "'" << std::endl;
for (int iQ1 = 0; iQ1 < nQ; iQ1++)
for (int iQ2 = 0; iQ2 < nQ; iQ2++)
LOG(Message) << prefactors[iQ1]*prefactors[iQ2] << "*<" << quarks[iQ1] << "|" << quarks[iQ2] << ">" << std::endl;
LOG(Message) << " using quarks " << par().q1 << "', " << par().q2 << "', and '" << par().q3 << std::endl;
for (int iG = 0; iG < gammaList.size(); iG++)
LOG(Message) << "' with (Gamma^A,Gamma^B)_left = ( " << gammaList[iG].first.first << " , " << gammaList[iG].first.second << "') and (Gamma^A,Gamma^B)_right = ( " << gammaList[iG].second.first << " , " << gammaList[iG].second.second << ")" << std::endl;
LOG(Message) << "and parity " << parity << " using sink " << par().sink << "." << std::endl;
envGetTmp(LatticeComplex, c);
envGetTmp(LatticeComplex, c2);
int nt = env().getDim(Tp);
std::vector<TComplex> buf;
TComplex cs;
TComplex ch;
std::vector<Result> result;
Result r;
r.info.parity = parity;
r.info.quarks = par().quarks;
r.info.prefactors = par().prefactors;
if (envHasType(SlicedPropagator1, par().q1) and
envHasType(SlicedPropagator2, par().q2) and
envHasType(SlicedPropagator3, par().q3))
{
auto &q1 = envGet(SlicedPropagator1, par().q1);
auto &q2 = envGet(SlicedPropagator2, par().q2);
auto &q3 = envGet(SlicedPropagator3, par().q3);
for (unsigned int i = 0; i < gammaList.size(); ++i)
{
r.info.gammaA_left = gammaList[i].first.first;
r.info.gammaB_left = gammaList[i].first.second;
r.info.gammaA_right = gammaList[i].second.first;
r.info.gammaB_right = gammaList[i].second.second;
Gamma gAl(gammaList[i].first.first);
Gamma gBl(gammaList[i].first.second);
Gamma gAr(gammaList[i].second.first);
Gamma gBr(gammaList[i].second.second);
LOG(Message) << "(propagator already sinked)" << std::endl;
r.corr.clear();
for (unsigned int t = 0; t < buf.size(); ++t)
{
cs = Zero();
for (int iQ1 = 0; iQ1 < nQ; iQ1++){
for (int iQ2 = 0; iQ2 < nQ; iQ2++){
BaryonUtils<FIMPL>::ContractBaryons_Sliced(q1[t],q2[t],q3[t],gAl,gBl,gAr,gBr,quarks[iQ1].c_str(),quarks[iQ2].c_str(),parity,ch);
cs += prefactors[iQ1]*prefactors[iQ2]*ch;
}
}
r.corr.push_back(TensorRemove(cs));
}
result.push_back(r);
}
}
else
{
auto &q1 = envGet(PropagatorField1, par().q1);
auto &q2 = envGet(PropagatorField2, par().q2);
auto &q3 = envGet(PropagatorField3, par().q3);
for (unsigned int i = 0; i < gammaList.size(); ++i)
{
r.info.gammaA_left = gammaList[i].first.first;
r.info.gammaB_left = gammaList[i].first.second;
r.info.gammaA_right = gammaList[i].second.first;
r.info.gammaB_right = gammaList[i].second.second;
Gamma gAl(gammaList[i].first.first);
Gamma gBl(gammaList[i].first.second);
Gamma gAr(gammaList[i].second.first);
Gamma gBr(gammaList[i].second.second);
std::string ns;
ns = vm().getModuleNamespace(env().getObjectModule(par().sink));
if (ns == "MSource")
{
c=Zero();
for (int iQ1 = 0; iQ1 < nQ; iQ1++){
for (int iQ2 = 0; iQ2 < nQ; iQ2++){
BaryonUtils<FIMPL>::ContractBaryons(q1,q2,q3,gAl,gBl,gAr,gBr,quarks[iQ1].c_str(),quarks[iQ2].c_str(),parity,c2);
c+=prefactors[iQ1]*prefactors[iQ2]*c2;
}
}
PropagatorField1 &sink = envGet(PropagatorField1, par().sink);
auto test = closure(trace(sink*c));
sliceSum(test, buf, Tp);
}
else if (ns == "MSink")
{
c=Zero();
for (int iQ1 = 0; iQ1 < nQ; iQ1++){
for (int iQ2 = 0; iQ2 < nQ; iQ2++){
BaryonUtils<FIMPL>::ContractBaryons(q1,q2,q3,gAl,gBl,gAr,gBr,quarks[iQ1].c_str(),quarks[iQ2].c_str(),parity,c2);
c+=prefactors[iQ1]*prefactors[iQ2]*c2;
}
}
SinkFnScalar &sink = envGet(SinkFnScalar, par().sink);
buf = sink(c);
}
r.corr.clear();
for (unsigned int t = 0; t < buf.size(); ++t)
{
r.corr.push_back(TensorRemove(buf[t]));
}
result.push_back(r);
}
}
saveResult(par().output, "baryon", result);
}
END_MODULE_NAMESPACE
END_HADRONS_NAMESPACE
#endif // Hadrons_MContraction_Baryon_hpp_
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