2018-12-14 12:40:26 +00:00
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/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: Hadrons/Modules/MSource/SeqAslash.hpp
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Copyright (C) 2015-2018
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Author: Antonin Portelli <antonin.portelli@me.com>
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Author: Lanny91 <andrew.lawson@gmail.com>
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Author: Vera Guelpers <Vera.Guelpers@ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef Hadrons_MSource_SeqAslash_hpp_
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#define Hadrons_MSource_SeqAslash_hpp_
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#include <Hadrons/Global.hpp>
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#include <Hadrons/Module.hpp>
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#include <Hadrons/ModuleFactory.hpp>
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BEGIN_HADRONS_NAMESPACE
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/*
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Sequential source
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-----------------------------
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* src_x = q_x * theta(x_3 - tA) * theta(tB - x_3) * i * A_mu g_mu * exp(i x.mom)
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* options:
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- q: input propagator (string)
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- tA: begin timeslice (integer)
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- tB: end timesilce (integer)
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- emField: input photon field (string)
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- mom: momentum insertion, space-separated float sequence (e.g ".1 .2 1. 0.")
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*/
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/******************************************************************************
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* SeqAslash *
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******************************************************************************/
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BEGIN_MODULE_NAMESPACE(MSource)
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class SeqAslashPar: Serializable
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{
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public:
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GRID_SERIALIZABLE_CLASS_MEMBERS(SeqAslashPar,
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std::string, q,
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unsigned int, tA,
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unsigned int, tB,
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std::string, emField,
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std::string, mom);
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};
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template <typename FImpl>
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class TSeqAslash: public Module<SeqAslashPar>
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{
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public:
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FERM_TYPE_ALIASES(FImpl,);
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public:
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typedef PhotonR::GaugeField EmField;
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public:
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// constructor
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TSeqAslash(const std::string name);
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// destructor
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virtual ~TSeqAslash(void) {};
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// dependency relation
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virtual std::vector<std::string> getInput(void);
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virtual std::vector<std::string> getOutput(void);
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protected:
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// setup
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virtual void setup(void);
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// execution
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virtual void execute(void);
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private:
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bool hasPhase_{false};
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std::string momphName_, tName_;
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};
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MODULE_REGISTER_TMP(SeqAslash, TSeqAslash<FIMPL>, MSource);
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/******************************************************************************
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* TSeqAslash implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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template <typename FImpl>
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TSeqAslash<FImpl>::TSeqAslash(const std::string name)
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: Module<SeqAslashPar>(name)
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, momphName_ (name + "_momph")
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, tName_ (name + "_t")
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{}
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// dependencies/products ///////////////////////////////////////////////////////
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template <typename FImpl>
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std::vector<std::string> TSeqAslash<FImpl>::getInput(void)
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{
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std::vector<std::string> in = {par().q,par().emField};
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return in;
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}
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template <typename FImpl>
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std::vector<std::string> TSeqAslash<FImpl>::getOutput(void)
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{
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std::vector<std::string> out = {getName()};
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return out;
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}
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// setup ///////////////////////////////////////////////////////////////////////
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template <typename FImpl>
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void TSeqAslash<FImpl>::setup(void)
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{
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envCreateLat(PropagatorField, getName());
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envCache(Lattice<iScalar<vInteger>>, tName_, 1, envGetGrid(LatticeComplex));
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envCacheLat(LatticeComplex, momphName_);
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envTmpLat(LatticeComplex, "coor");
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}
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// execution ///////////////////////////////////////////////////////////////////
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template <typename FImpl>
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void TSeqAslash<FImpl>::execute(void)
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{
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if (par().tA == par().tB)
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{
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LOG(Message) << "Generating Aslash sequential source at t= " << par().tA
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<< " using the photon field " << par().emField << std::endl;
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}
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else
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{
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LOG(Message) << "Generating Aslash sequential source for "
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<< par().tA << " <= t <= " << par().tB
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<< " using the photon field " << par().emField << std::endl;
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}
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auto &src = envGet(PropagatorField, getName()); src=Zero();
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2018-12-14 12:40:26 +00:00
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auto &q = envGet(PropagatorField, par().q);
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auto &ph = envGet(LatticeComplex, momphName_);
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auto &t = envGet(Lattice<iScalar<vInteger>>, tName_);
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if (!hasPhase_)
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{
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Complex i(0.0,1.0);
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std::vector<Real> p;
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envGetTmp(LatticeComplex, coor);
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p = strToVec<Real>(par().mom);
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ph = Zero();
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2018-12-14 12:40:26 +00:00
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for(unsigned int mu = 0; mu < env().getNd(); mu++)
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{
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LatticeCoordinate(coor, mu);
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ph = ph + (p[mu]/env().getDim(mu))*coor;
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}
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ph = exp((Real)(2*M_PI)*i*ph);
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LatticeCoordinate(t, Tp);
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hasPhase_ = true;
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}
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auto &stoch_photon = envGet(EmField, par().emField);
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Complex ci(0.0,1.0);
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for(unsigned int mu=0;mu<=3;mu++)
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{
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Gamma gmu(Gamma::gmu[mu]);
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src = src + where((t >= par().tA) and (t <= par().tB), ci * PeekIndex<LorentzIndex>(stoch_photon, mu) *ph*(gmu*q), 0.*q);
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}
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}
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END_MODULE_NAMESPACE
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END_HADRONS_NAMESPACE
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#endif // Hadrons_MSource_SeqAslash_hpp_
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