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116 lines
4.0 KiB
C++
116 lines
4.0 KiB
C++
/*******************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: tests/hadrons/Test_hadrons_meson_conserved_3pt.cc
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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
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directory.
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*******************************************************************************/
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#include "Test_hadrons.hpp"
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using namespace Grid;
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using namespace Hadrons;
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int main(int argc, char *argv[])
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{
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// initialization //////////////////////////////////////////////////////////
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HADRONS_DEFAULT_INIT;
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// run setup ///////////////////////////////////////////////////////////////
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Application application;
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// actions parameters
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double mass = 0.04;
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unsigned int Ls = 16;
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double M5 = 1.8;
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// kinematics
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unsigned int nt = GridDefaultLatt()[Tp];
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unsigned int tSrc = 0;
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unsigned int tJ = nt / 4;
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std::string kmom = "0. 0. 0. 0.";
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std::string pmom = "1. 0. 0. 0.";
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// Global parameters.
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HADRONS_DEFAULT_GLOBALS(application);
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// Unit gauge field.
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std::string gaugeField = "Unit gauge";
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application.createModule<MGauge::Unit>(gaugeField);
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// DWF action
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std::string actionName = "DWF";
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makeDWFAction(application, actionName, gaugeField, mass, M5, Ls);
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// Solver
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std::string solver = "CG";
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makeRBPrecCGSolver(application, solver, actionName);
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// main test body //////////////////////////////////////////////////////////
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// Point sink modules.
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std::string sink_0 = "sink_0";
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std::string sink_p = "sink_p";
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MSink::Point::Par sinkPar;
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sinkPar.mom = kmom;
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application.createModule<MSink::ScalarPoint>(sink_0, sinkPar);
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sinkPar.mom = pmom;
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application.createModule<MSink::ScalarPoint>(sink_p, sinkPar);
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// 2pt pion contraction, zero momentum.
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std::string q_0 = "Q_0";
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MAKE_WALL_PROP(tSrc, q_0, solver);
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std::string modName = INIT_INDEX("2pt_pion_WP", tSrc);
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std::string output = "2pt/pion_WP_0";
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mesonContraction(application, modName, output, q_0, q_0, sink_0);
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// 2pt pion contraction, with momentum p.
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std::string q_p = "Q_p";
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MAKE_3MOM_WALL_PROP(tSrc, pmom, q_p, solver);
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modName = INIT_INDEX("2pt_pion_WP_p", tSrc);
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output = "2pt/pion_WP_p";
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mesonContraction(application, modName, output, q_0, q_p, sink_p);
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// 3pt pion(0) -> pion(p), with sequentially inserted vector current in
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// time direction.
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std::string qSeq = q_0 + INIT_INDEX("_seq_Vc3", tJ);
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std::string q5d = LABEL_5D(q_0); // Need 5D prop for DWF conserved current.
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std::string srcName = qSeq + "_src";
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modName = LABEL_3PT("3pt_pion_Vc3", tSrc, tJ);
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output = "3pt/pion_Vc3_p";
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makeConservedSequentialSource(application, srcName, q5d, actionName,
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tJ, Current::Vector, Tp, pmom);
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makePropagator(application, qSeq, srcName, solver);
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mesonContraction(application, modName, output, q_0, qSeq, sink_p);
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std::string par_file_name = "conserved_3pt.xml";
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application.saveParameterFile(par_file_name);
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application.run();
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// epilogue
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LOG(Message) << "Grid is finalizing now" << std::endl;
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Grid_finalize();
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return EXIT_SUCCESS;
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}
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