mirror of
https://github.com/paboyle/Grid.git
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258 lines
9.3 KiB
C++
258 lines
9.3 KiB
C++
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#include <Grid/Hadrons/Modules/MScalar/VPCounterTerms.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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* TVPCounterTerms implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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TVPCounterTerms::TVPCounterTerms(const std::string name)
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: Module<VPCounterTermsPar>(name)
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{}
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// dependencies/products ///////////////////////////////////////////////////////
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std::vector<std::string> TVPCounterTerms::getInput(void)
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{
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std::vector<std::string> in = {par().source};
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return in;
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}
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std::vector<std::string> TVPCounterTerms::getOutput(void)
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{
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std::vector<std::string> out;
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return out;
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}
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// setup ///////////////////////////////////////////////////////////////////////
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void TVPCounterTerms::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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phatsqName_ = "_" + getName() + "_pHatSquared";
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prop0Name_ = getName() + "_freeProp";
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twoscalarName_ = getName() + "_2scalarProp";
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twoscalarVertexName_ = getName() + "_2scalarProp_withvertex";
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psquaredName_ = getName() + "_psquaredProp";
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env().registerLattice<ScalarField>(freeMomPropName_);
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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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env().registerLattice<ScalarField>(phatsqName_);
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env().registerLattice<ScalarField>(GFSrcName_);
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env().registerLattice<ScalarField>(prop0Name_);
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env().registerLattice<ScalarField>(twoscalarName_);
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env().registerLattice<ScalarField>(twoscalarVertexName_);
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env().registerLattice<ScalarField>(psquaredName_);
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}
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// execution ///////////////////////////////////////////////////////////////////
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void TVPCounterTerms::execute(void)
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{
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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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ScalarField buf(env().getGrid()), tmp_vp(env().getGrid());
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// Momentum-space free scalar propagator
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ScalarField &G = *env().createLattice<ScalarField>(freeMomPropName_);
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SIMPL::MomentumSpacePropagator(G, par().mass);
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// Phases and hat{p}^2
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ScalarField &phatsq = *env().createLattice<ScalarField>(phatsqName_);
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std::vector<int> &l = env().getGrid()->_fdimensions;
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LOG(Message) << "Calculating shift phases..." << std::endl;
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phatsq = zero;
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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(buf, mu);
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*(phase_[mu]) = exp(ci*twoPiL*buf);
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buf = 2.*sin(.5*twoPiL*buf);
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phatsq = phatsq + buf*buf;
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}
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// G*F*src
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ScalarField &GFSrc = *env().createLattice<ScalarField>(GFSrcName_);
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fft.FFT_all_dim(GFSrc, source, FFT::forward);
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GFSrc = G*GFSrc;
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// Position-space free scalar propagator
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ScalarField &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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// Propagators for counter-terms
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ScalarField &twoscalarProp = *env().createLattice<ScalarField>(twoscalarName_);
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ScalarField &twoscalarVertexProp = *env().createLattice<ScalarField>(twoscalarVertexName_);
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ScalarField &psquaredProp = *env().createLattice<ScalarField>(psquaredName_);
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twoscalarProp = G*GFSrc;
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fft.FFT_all_dim(twoscalarProp, twoscalarProp, FFT::backward);
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twoscalarVertexProp = zero;
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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buf = GFSrc;
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twoscalarVertexProp = twoscalarVertexProp + .5*((*phase_[mu]) + adj(*phase_[mu]))*buf;
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}
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twoscalarVertexProp = G*twoscalarVertexProp;
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fft.FFT_all_dim(twoscalarVertexProp, twoscalarVertexProp, FFT::backward);
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psquaredProp = G*phatsq*GFSrc;
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fft.FFT_all_dim(psquaredProp, psquaredProp, FFT::backward);
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// Open output files if necessary
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std::vector<TComplex> vecBuf;
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std::vector<Complex> result;
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ScalarField vpPhase(env().getGrid());
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std::vector<CorrWriter *> writer;
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std::vector<ScalarField> momphases;
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if (!par().output.empty())
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{
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LOG(Message) << "Preparing output files..." << std::endl;
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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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// Open output files
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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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if (env().getGrid()->IsBoss())
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{
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CorrWriter *writer_i = new CorrWriter(filename);
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writer.push_back(writer_i);
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write(*writer[i_p], "mass", par().mass);
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}
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// Calculate phase factors
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vpPhase = Complex(1.0,0.0);
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for (unsigned int j = 0; j < env().getNd()-1; ++j)
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{
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for (unsigned int momcount = 0; momcount < mom[j]; ++momcount)
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{
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vpPhase = vpPhase*(*phase_[j]);
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}
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}
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vpPhase = adj(vpPhase);
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momphases.push_back(vpPhase);
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}
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}
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// Contractions
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for (unsigned int nu = 0; nu < env().getNd(); ++nu)
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{
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buf = adj(Cshift(prop0, nu, -1));
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for (unsigned int mu = 0; mu < env().getNd(); ++mu)
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{
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// Three-scalar loop (no vertex)
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tmp_vp = buf * Cshift(twoscalarProp, mu, 1);
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tmp_vp -= Cshift(buf, mu, 1) * twoscalarProp;
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tmp_vp = 2.0*real(tmp_vp);
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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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vpPhase = tmp_vp*momphases[i_p];
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sliceSum(vpPhase, vecBuf, Tp);
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result.resize(vecBuf.size());
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for (unsigned int t = 0; t < vecBuf.size(); ++t)
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{
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result[t] = TensorRemove(vecBuf[t]);
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}
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if (env().getGrid()->IsBoss())
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{
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write(*writer[i_p],
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"NoVertex_"+std::to_string(mu)+"_"+std::to_string(nu),
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result);
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}
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}
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}
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// Three-scalar loop (tadpole vertex)
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tmp_vp = buf * Cshift(twoscalarVertexProp, mu, 1);
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tmp_vp -= Cshift(buf, mu, 1) * twoscalarVertexProp;
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tmp_vp = 2.0*real(tmp_vp);
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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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vpPhase = tmp_vp*momphases[i_p];
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sliceSum(vpPhase, vecBuf, Tp);
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result.resize(vecBuf.size());
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for (unsigned int t = 0; t < vecBuf.size(); ++t)
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{
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result[t] = TensorRemove(vecBuf[t]);
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}
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if (env().getGrid()->IsBoss())
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{
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write(*writer[i_p],
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"TadVertex_"+std::to_string(mu)+"_"+std::to_string(nu),
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result);
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}
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}
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}
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// Three-scalar loop (hat{p}^2 insertion)
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tmp_vp = buf * Cshift(psquaredProp, mu, 1);
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tmp_vp -= Cshift(buf, mu, 1) * psquaredProp;
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tmp_vp = 2.0*real(tmp_vp);
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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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vpPhase = tmp_vp*momphases[i_p];
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sliceSum(vpPhase, vecBuf, Tp);
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result.resize(vecBuf.size());
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for (unsigned int t = 0; t < vecBuf.size(); ++t)
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{
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result[t] = TensorRemove(vecBuf[t]);
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}
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if (env().getGrid()->IsBoss())
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{
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write(*writer[i_p],
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"pSquaredInsertion_"+std::to_string(mu)+"_"+std::to_string(nu),
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result);
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}
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}
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}
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}
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}
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// Close output files 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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if (env().getGrid()->IsBoss())
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{
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delete writer[i_p];
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}
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}
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}
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}
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