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154 lines
4.7 KiB
C++
154 lines
4.7 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: Hadrons/Modules/MGauge/Electrify.hpp
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Copyright (C) 2015-2019
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Author: Antonin Portelli <antonin.portelli@me.com>
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Author: Vera Guelpers <Vera.Guelpers@ed.ac.uk>
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Author: Vera Guelpers <vmg1n14@soton.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_MGauge_Electrify_hpp_
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#define Hadrons_MGauge_Electrify_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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* Electrify gauge *
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******************************************************************************/
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BEGIN_MODULE_NAMESPACE(MGauge)
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/****************************************************************************
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* Electrify a gauge field:
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*
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* Ue_mu(x) = U_mu(x)*exp(ieqA_mu(x))
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*
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* with
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*
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* - gauge: U_mu(x): gauge field
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* - emField: A_mu(x): electromagnetic photon field
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* - e: value for the elementary charge
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* - q: charge in units of e
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*
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*****************************************************************************/
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class ElectrifyPar: Serializable
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{
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public:
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GRID_SERIALIZABLE_CLASS_MEMBERS(ElectrifyPar,
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std::string, gauge,
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std::string, emField,
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double, e,
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double, charge);
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};
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template <typename GImpl>
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class TElectrify: public Module<ElectrifyPar>
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{
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public:
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GAUGE_TYPE_ALIASES(GImpl,);
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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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TElectrify(const std::string name);
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// destructor
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virtual ~TElectrify(void) {};
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// dependencies/products
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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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};
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MODULE_REGISTER_TMP(Electrify, TElectrify<GIMPL>, MGauge);
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/******************************************************************************
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* TElectrify implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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template <typename GImpl>
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TElectrify<GImpl>::TElectrify(const std::string name)
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: Module<ElectrifyPar>(name)
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{}
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// dependencies/products ///////////////////////////////////////////////////////
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template <typename GImpl>
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std::vector<std::string> TElectrify<GImpl>::getInput(void)
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{
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std::vector<std::string> in = {par().gauge, par().emField};
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return in;
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}
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template <typename GImpl>
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std::vector<std::string> TElectrify<GImpl>::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 GImpl>
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void TElectrify<GImpl>::setup(void)
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{
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envCreateLat(GaugeField, getName());
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envTmpLat(LatticeComplex, "eiAmu");
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}
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// execution ///////////////////////////////////////////////////////////////////
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template <typename GImpl>
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void TElectrify<GImpl>::execute(void)
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{
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LOG(Message) << "Electrify the gauge field " << par().gauge << " using the photon field "
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<< par().emField << " with charge e*q= " << par().e << "*" << par().charge << std::endl;
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auto &Ue = envGet(GaugeField, getName());
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auto &U = envGet(GaugeField, par().gauge);
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auto &A = envGet(EmField, par().emField);
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envGetTmp(LatticeComplex, eiAmu);
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Complex i(0.0,1.0);
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for(unsigned int mu = 0; mu < env().getNd(); mu++)
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{
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eiAmu = exp(i * (Real)(par().e * par().charge) * PeekIndex<LorentzIndex>(A, mu));
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PokeIndex<LorentzIndex>(Ue, PeekIndex<LorentzIndex>(U, mu) * eiAmu, mu);
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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_MGauge_Electrify_hpp_
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