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153 lines
4.5 KiB
C++
153 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/Z2.hpp
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Copyright (C) 2015
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Copyright (C) 2016
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Author: Antonin Portelli <antonin.portelli@me.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_Z2_hpp_
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#define Hadrons_MSource_Z2_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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Z_2 stochastic source
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-----------------------------
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* src_x = eta_x * theta(x_3 - tA) * theta(tB - x_3)
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the eta_x are independent uniform random numbers in {+/- 1 +/- i}
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* options:
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- tA: begin timeslice (integer)
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- tB: end timesilce (integer)
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*/
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/******************************************************************************
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* Z2 stochastic source *
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******************************************************************************/
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BEGIN_MODULE_NAMESPACE(MSource)
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class Z2Par: Serializable
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{
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public:
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GRID_SERIALIZABLE_CLASS_MEMBERS(Z2Par,
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unsigned int, tA,
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unsigned int, tB);
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};
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template <typename FImpl>
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class TZ2: public Module<Z2Par>
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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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TZ2(const std::string name);
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// destructor
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virtual ~TZ2(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(Z2, TZ2<FIMPL>, MSource);
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MODULE_REGISTER_NS(ScalarZ2, TZ2<ScalarImplCR>, MSource);
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/******************************************************************************
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* TZ2 template implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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template <typename FImpl>
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TZ2<FImpl>::TZ2(const std::string name)
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: Module<Z2Par>(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> TZ2<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> TZ2<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 TZ2<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 TZ2<FImpl>::execute(void)
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{
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Lattice<iScalar<vInteger>> t(env().getGrid());
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LatticeComplex eta(env().getGrid());
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Complex shift(1., 1.);
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if (par().tA == par().tB)
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{
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LOG(Message) << "Generating Z_2 wall source at t= " << par().tA
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<< std::endl;
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}
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else
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{
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LOG(Message) << "Generating Z_2 band for " << par().tA << " <= t <= "
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<< par().tB << std::endl;
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}
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PropagatorField &src = *env().template createLattice<PropagatorField>(getName());
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LatticeCoordinate(t, Tp);
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bernoulli(*env().get4dRng(), eta);
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eta = (2.*eta - shift)*(1./::sqrt(2.));
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eta = where((t >= par().tA) and (t <= par().tB), eta, 0.*eta);
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src = 1.;
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src = src*eta;
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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_Z2_hpp_
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