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dft_tools/triqs/mc_tools/mc_basic_step.hpp
Olivier Parcollet c0993d9db8 mc_tools : add debug print under macro
When TRIQS_MCTOOLS_DEBUG is defined,
the qmc now reports some basic debug info
(when is a move accepted, rejected, ...).
2013-12-23 23:21:30 +01:00

60 lines
1.7 KiB
C++

/*******************************************************************************
*
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
*
* Copyright (C) 2011 by M. Ferrero, O. Parcollet
*
* TRIQS is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
#ifndef MC_STEPS_H
#define MC_STEPS_H
#include <boost/mpi.hpp>
#include "mc_move_set.hpp"
namespace triqs {
namespace mc_tools {
namespace Step {
// Performs one Metropolis step
template <typename MCSignType> struct Metropolis {
static void do_it(move_set<MCSignType>& MoveGroup, random_generator& RNG, MCSignType& signe) {
double r = MoveGroup.attempt();
if (RNG() < std::min(1.0, r)) {
#ifdef TRIQS_MCTOOLS_DEBUG
std::cerr << " Move accepted " << std::endl;
#endif
signe *= MoveGroup.accept();
#ifdef TRIQS_MCTOOLS_DEBUG
std::cerr << " New sign = " << signe << std::endl;
#endif
} else {
#ifdef TRIQS_MCTOOLS_DEBUG
std::cerr << " Move rejected " << std::endl;
#endif
MoveGroup.reject();
}
}
};
// Put heat Bath here ....
}
}
}
#endif