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305 lines
10 KiB
C++
305 lines
10 KiB
C++
#include <Grid/Hadrons/Modules/MScalar/ChargedProp.hpp>
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#include <Grid/Hadrons/Modules/MScalar/Scalar.hpp>
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using namespace Grid;
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using namespace Hadrons;
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using namespace MScalar;
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/******************************************************************************
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* TChargedProp implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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TChargedProp::TChargedProp(const std::string name)
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: Module<ChargedPropPar>(name)
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{}
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// dependencies/products ///////////////////////////////////////////////////////
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std::vector<std::string> TChargedProp::getInput(void)
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{
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std::vector<std::string> in = {par().source, par().emField};
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return in;
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}
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std::vector<std::string> TChargedProp::getOutput(void)
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{
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std::vector<std::string> out = {getName(), getName()+"_Q",
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getName()+"_Sun", getName()+"_Tad"};
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return out;
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}
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// setup ///////////////////////////////////////////////////////////////////////
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void TChargedProp::setup(void)
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{
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freeMomPropName_ = FREEMOMPROP(par().mass);
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phaseName_.clear();
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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phaseName_.push_back("_shiftphase_" + std::to_string(mu));
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}
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GFSrcName_ = "_" + getName() + "_DinvSrc";
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prop0Name_ = getName() + "_0";
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propQName_ = getName() + "_Q";
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propSunName_ = getName() + "_Sun";
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propTadName_ = getName() + "_Tad";
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if (!env().hasRegisteredObject(freeMomPropName_))
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{
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env().registerLattice<ScalarField>(freeMomPropName_);
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}
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if (!env().hasRegisteredObject(phaseName_[0]))
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{
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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env().registerLattice<ScalarField>(phaseName_[mu]);
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}
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}
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if (!env().hasRegisteredObject(GFSrcName_))
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{
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env().registerLattice<ScalarField>(GFSrcName_);
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}
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if (!env().hasRegisteredObject(prop0Name_))
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{
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env().registerLattice<ScalarField>(prop0Name_);
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}
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env().registerLattice<ScalarField>(getName());
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env().registerLattice<ScalarField>(propQName_);
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env().registerLattice<ScalarField>(propSunName_);
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env().registerLattice<ScalarField>(propTadName_);
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}
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// execution ///////////////////////////////////////////////////////////////////
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void TChargedProp::execute(void)
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{
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// CACHING ANALYTIC EXPRESSIONS
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ScalarField &source = *env().getObject<ScalarField>(par().source);
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Complex ci(0.0,1.0);
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FFT fft(env().getGrid());
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// cache momentum-space free scalar propagator
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if (!env().hasCreatedObject(freeMomPropName_))
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{
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LOG(Message) << "Caching momentum space free scalar propagator"
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<< " (mass= " << par().mass << ")..." << std::endl;
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freeMomProp_ = env().createLattice<ScalarField>(freeMomPropName_);
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SIMPL::MomentumSpacePropagator(*freeMomProp_, par().mass);
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}
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else
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{
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freeMomProp_ = env().getObject<ScalarField>(freeMomPropName_);
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}
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// cache G*F*src
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if (!env().hasCreatedObject(GFSrcName_))
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{
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GFSrc_ = env().createLattice<ScalarField>(GFSrcName_);
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fft.FFT_all_dim(*GFSrc_, source, FFT::forward);
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*GFSrc_ = (*freeMomProp_)*(*GFSrc_);
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}
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else
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{
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GFSrc_ = env().getObject<ScalarField>(GFSrcName_);
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}
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// cache position-space free scalar propagator
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if (!env().hasCreatedObject(prop0Name_))
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{
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prop0_ = env().createLattice<ScalarField>(prop0Name_);
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*prop0_ = *GFSrc_;
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fft.FFT_all_dim(*prop0_, *prop0_, FFT::backward);
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}
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else
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{
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prop0_ = env().getObject<ScalarField>(prop0Name_);
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}
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// cache phases
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if (!env().hasCreatedObject(phaseName_[0]))
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{
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std::vector<int> &l = env().getGrid()->_fdimensions;
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LOG(Message) << "Caching shift phases..." << std::endl;
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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Real twoPiL = M_PI*2./l[mu];
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phase_.push_back(env().createLattice<ScalarField>(phaseName_[mu]));
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LatticeCoordinate(*(phase_[mu]), mu);
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*(phase_[mu]) = exp(ci*twoPiL*(*(phase_[mu])));
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}
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}
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else
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{
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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phase_.push_back(env().getObject<ScalarField>(phaseName_[mu]));
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}
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}
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// PROPAGATOR CALCULATION
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LOG(Message) << "Computing charged scalar propagator"
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<< " (mass= " << par().mass
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<< ", charge= " << par().charge << ")..." << std::endl;
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ScalarField &prop = *env().createLattice<ScalarField>(getName());
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ScalarField &propQ = *env().createLattice<ScalarField>(propQName_);
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ScalarField &propSun = *env().createLattice<ScalarField>(propSunName_);
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ScalarField &propTad = *env().createLattice<ScalarField>(propTadName_);
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ScalarField buf(env().getGrid());
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ScalarField &GFSrc = *GFSrc_, &G = *freeMomProp_;
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double q = par().charge;
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// -G*momD1*G*F*Src (momD1 = F*D1*Finv)
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buf = GFSrc;
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momD1(buf, fft);
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buf = -G*buf;
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fft.FFT_dim(propQ, buf, env().getNd()-1, FFT::backward);
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// G*momD1*G*momD1*G*F*Src (here buf = G*momD1*G*F*Src)
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buf = -buf;
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momD1(buf, fft);
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propSun = G*buf;
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fft.FFT_dim(propSun, propSun, env().getNd()-1, FFT::backward);
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// -G*momD2*G*F*Src (momD2 = F*D2*Finv)
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buf = GFSrc;
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momD2(buf, fft);
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buf = -G*buf;
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fft.FFT_dim(propTad, buf, env().getNd()-1, FFT::backward);
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// full charged scalar propagator
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buf = GFSrc;
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fft.FFT_dim(buf, buf, env().getNd()-1, FFT::backward);
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prop = buf + q*propQ + q*q*propSun + q*q*propTad;
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// OUTPUT IF NECESSARY
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if (!par().output.empty())
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{
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for (unsigned int i_p = 0; i_p < par().outputMom.size(); ++i_p)
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{
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std::vector<int> mom = strToVec<int>(par().outputMom[i_p]);
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std::string filename = par().output + "_" + std::to_string(mom[0])
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+ std::to_string(mom[1])
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+ std::to_string(mom[2])
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+ "." +
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std::to_string(env().getTrajectory());
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LOG(Message) << "Saving (" << par().outputMom[i_p] << ") momentum projection to '"
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<< filename << "'..." << std::endl;
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// std::vector<TComplex> vecBuf;
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std::vector<Complex> result, result0, resultQ, resultSun, resultTad;
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result.resize(env().getGrid()->_fdimensions[env().getNd()-1]);
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result0.resize(env().getGrid()->_fdimensions[env().getNd()-1]);
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resultQ.resize(env().getGrid()->_fdimensions[env().getNd()-1]);
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resultSun.resize(env().getGrid()->_fdimensions[env().getNd()-1]);
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resultTad.resize(env().getGrid()->_fdimensions[env().getNd()-1]);
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TComplex site;
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std::vector<int> whichmom;
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whichmom.resize(env().getNd());
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for (unsigned int j = 0; j < env().getNd()-1; ++j)
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{
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whichmom[j] = mom[j];
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}
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for (unsigned int t = 0; t < env().getGrid()->_fdimensions[env().getNd()-1]; ++t)
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{
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whichmom[env().getNd()-1] = t;
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// Write full propagator
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peekSite(site, prop, whichmom);
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result[t]=TensorRemove(site);
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// Write free propagator
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peekSite(site, buf, whichmom);
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result0[t]=TensorRemove(site);
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// Write propagator O(q) term
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peekSite(site, propQ, whichmom);
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resultQ[t]=TensorRemove(site);
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// Write propagator sunset term
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peekSite(site, propSun, whichmom);
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resultSun[t]=TensorRemove(site);
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// Write propagator tadpole term
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peekSite(site, propTad, whichmom);
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resultTad[t]=TensorRemove(site);
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}
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if (env().getGrid()->IsBoss())
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{
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CorrWriter writer(filename);
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write(writer, "charge", q);
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write(writer, "mass", par().mass);
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write(writer, "prop", result);
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write(writer, "prop_0", result0);
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write(writer, "prop_Q", resultQ);
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write(writer, "prop_Sun", resultSun);
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write(writer, "prop_Tad", resultTad);
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}
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}
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}
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std::vector<int> mask(env().getNd(),1);
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mask[env().getNd()-1] = 0;
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fft.FFT_dim_mask(prop, prop, mask, FFT::backward);
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fft.FFT_dim_mask(propQ, propQ, mask, FFT::backward);
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fft.FFT_dim_mask(propSun, propSun, mask, FFT::backward);
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fft.FFT_dim_mask(propTad, propTad, mask, FFT::backward);
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}
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void TChargedProp::momD1(ScalarField &s, FFT &fft)
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{
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EmField &A = *env().getObject<EmField>(par().emField);
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ScalarField buf(env().getGrid()), result(env().getGrid()),
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Amu(env().getGrid());
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Complex ci(0.0,1.0);
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result = zero;
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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Amu = peekLorentz(A, mu);
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buf = (*phase_[mu])*s;
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fft.FFT_all_dim(buf, buf, FFT::backward);
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buf = Amu*buf;
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fft.FFT_all_dim(buf, buf, FFT::forward);
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result = result - ci*buf;
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}
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fft.FFT_all_dim(s, s, FFT::backward);
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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Amu = peekLorentz(A, mu);
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buf = Amu*s;
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fft.FFT_all_dim(buf, buf, FFT::forward);
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result = result + ci*adj(*phase_[mu])*buf;
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}
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s = result;
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}
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void TChargedProp::momD2(ScalarField &s, FFT &fft)
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{
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EmField &A = *env().getObject<EmField>(par().emField);
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ScalarField buf(env().getGrid()), result(env().getGrid()),
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Amu(env().getGrid());
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result = zero;
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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Amu = peekLorentz(A, mu);
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buf = (*phase_[mu])*s;
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fft.FFT_all_dim(buf, buf, FFT::backward);
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buf = Amu*Amu*buf;
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fft.FFT_all_dim(buf, buf, FFT::forward);
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result = result + .5*buf;
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}
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fft.FFT_all_dim(s, s, FFT::backward);
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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Amu = peekLorentz(A, mu);
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buf = Amu*Amu*s;
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fft.FFT_all_dim(buf, buf, FFT::forward);
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result = result + .5*adj(*phase_[mu])*buf;
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}
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s = result;
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}
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