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122 lines
3.5 KiB
C++
122 lines
3.5 KiB
C++
#ifndef Hadrons_MomSource_hpp_
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#define Hadrons_MomSource_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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Plane Wave source
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-----------------
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src_x = e^i2pi/L * p *position
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*/
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/******************************************************************************
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* TPlane *
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******************************************************************************/
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BEGIN_MODULE_NAMESPACE(MSource)
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class MomSourcePar: Serializable
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{
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public:
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//What is meant by serializable in this context
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GRID_SERIALIZABLE_CLASS_MEMBERS(MomSourcePar,
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std::string, mom);
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};
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template <typename FImpl>
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class TMomSource: public Module<MomSourcePar>
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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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// constructor
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TMomSource(const std::string name);
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// destructor
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virtual ~TMomSource(void) = default;
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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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// 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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};
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MODULE_REGISTER_TMP(MomSource, TMomSource<FIMPL>, MSource);
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//MODULE_REGISTER_NS(MomSource, TMomSource, MSource);
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/******************************************************************************
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* TMomSource template implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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template <typename FImpl>
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TMomSource<FImpl>::TMomSource(const std::string name)
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: Module<MomSourcePar>(name)
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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> TMomSource<FImpl>::getInput(void)
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{
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std::vector<std::string> in;
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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> TMomSource<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 TMomSource<FImpl>::setup(void)
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{
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envCreateLat(PropagatorField, getName());
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}
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//execution//////////////////////////////////////////////////////////////////
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template <typename FImpl>
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void TMomSource<FImpl>::execute(void)
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{
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LOG(Message) << "Generating planewave momentum source with momentum " << par().mom << std::endl;
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//what does this env do?
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PropagatorField &src = envGet(PropagatorField, getName());
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Lattice<iScalar<vInteger>> t(env().getGrid());
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LatticeComplex C(env().getGrid()), coor(env().getGrid());
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std::vector<Real> p;
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std::vector<Real> latt_size(GridDefaultLatt().begin(), GridDefaultLatt().end());
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Complex i(0.0,1.0);
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LOG(Message) << " " << std::endl;
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//get the momentum from parameters
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p = strToVec<Real>(par().mom);
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C = zero;
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LOG(Message) << "momentum converted from string - " << std::to_string(p[0]) <<std::to_string(p[1]) <<std::to_string(p[2]) << std::to_string(p[3]) << std::endl;
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for(int mu=0;mu<4;mu++){
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Real TwoPiL = M_PI * 2.0/ latt_size[mu];
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LatticeCoordinate(coor,mu);
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C = C +(TwoPiL * p[mu]) * coor;
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}
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C = exp(C*i);
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LOG(Message) << "exponential of pdotx taken " << std::endl;
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src = src + C;
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LOG(Message) << "source created" << std::endl;
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}
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END_MODULE_NAMESPACE
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END_HADRONS_NAMESPACE
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#endif // Hadrons_MomSource_hpp_
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