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148 lines
4.5 KiB
C++
148 lines
4.5 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: extras/Hadrons/Modules/MSource/Wall.hpp
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Copyright (C) 2017
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Author: Andrew Lawson <andrew.lawson1991@gmail.com>
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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_WallSource_hpp_
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#define Hadrons_MSource_WallSource_hpp_
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#include <Grid/Hadrons/Global.hpp>
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#include <Grid/Hadrons/Module.hpp>
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#include <Grid/Hadrons/ModuleFactory.hpp>
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BEGIN_HADRONS_NAMESPACE
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/*
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Wall source
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-----------------------------
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* src_x = delta(x_3 - tW) * exp(i x.mom)
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* options:
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- tW: source timeslice (integer)
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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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* Wall *
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******************************************************************************/
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BEGIN_MODULE_NAMESPACE(MSource)
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class WallPar: Serializable
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{
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public:
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GRID_SERIALIZABLE_CLASS_MEMBERS(WallPar,
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unsigned int, tW,
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std::string, mom);
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};
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template <typename FImpl>
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class TWall: public Module<WallPar>
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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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TWall(const std::string name);
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// destructor
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virtual ~TWall(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_NS(Wall, TWall<FIMPL>, MSource);
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/******************************************************************************
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* TWall implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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template <typename FImpl>
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TWall<FImpl>::TWall(const std::string name)
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: Module<WallPar>(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> TWall<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> TWall<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 TWall<FImpl>::setup(void)
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{
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env().template registerLattice<PropagatorField>(getName());
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}
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// execution ///////////////////////////////////////////////////////////////////
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template <typename FImpl>
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void TWall<FImpl>::execute(void)
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{
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LOG(Message) << "Generating wall source at t = " << par().tW
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<< " with momentum " << par().mom << std::endl;
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PropagatorField &src = *env().template createLattice<PropagatorField>(getName());
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Lattice<iScalar<vInteger>> t(env().getGrid());
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LatticeComplex ph(env().getGrid()), coor(env().getGrid());
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std::vector<Real> p;
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Complex i(0.0,1.0);
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p = strToVec<Real>(par().mom);
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ph = zero;
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for(unsigned int mu = 0; mu < Nd; mu++)
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{
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LatticeCoordinate(coor, mu);
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ph = ph + p[mu]*coor*((1./(env().getGrid()->_fdimensions[mu])));
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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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src = 1.;
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src = where((t == par().tW), src*ph, 0.*src);
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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_WallSource_hpp_
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