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Jacobian action wrapper for FTHMC

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Peter Boyle 2023-06-01 06:15:08 -04:00
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commit 0982e0d19b
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Grid/qcd/smearing/JacobianAction.h Normal file
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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./lib/qcd/action/gauge/WilsonGaugeAction.h
Copyright (C) 2015
Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: neo <cossu@post.kek.jp>
Author: paboyle <paboyle@ph.ed.ac.uk>
Author: Guido Cossu <guido.cossu@ed.ac.uk>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution
directory
*************************************************************************************/
/* END LEGAL */
#pragma once
NAMESPACE_BEGIN(Grid);
////////////////////////////////////////////////////////////////////////
// Jacobian Action ..
////////////////////////////////////////////////////////////////////////
template <class Gimpl>
class JacobianAction : public Action<typename Gimpl::GaugeField> {
public:
INHERIT_GIMPL_TYPES(Gimpl);
SmearedConfigurationMasked<Gimpl> * smearer;
/////////////////////////// constructors
explicit JacobianAction(SmearedConfigurationMasked<Gimpl> * _smearer ) { smearer=_smearer;};
virtual std::string action_name() {return "JacobianAction";}
virtual std::string LogParameters(){
std::stringstream sstream;
sstream << GridLogMessage << "[JacobianAction] " << std::endl;
return sstream.str();
}
//////////////////////////////////
// Usual cases are not used
//////////////////////////////////
virtual void refresh(const GaugeField &U, GridSerialRNG &sRNG, GridParallelRNG &pRNG){ assert(0);};
virtual RealD S(const GaugeField &U) { assert(0); }
virtual void deriv(const GaugeField &U, GaugeField &dSdU) { assert(0); }
//////////////////////////////////
// Functions of smart configs only
//////////////////////////////////
virtual void refresh(ConfigurationBase<GaugeField> & U, GridSerialRNG &sRNG, GridParallelRNG& pRNG)
{
return;
}
virtual RealD S(ConfigurationBase<GaugeField>& U)
{
// det M = e^{ - ( - logDetM) }
assert( &U == smearer );
return -smearer->logDetJacobian();
}
virtual RealD Sinitial(ConfigurationBase<GaugeField>& U)
{
return S(U);
}
virtual void deriv(ConfigurationBase<GaugeField>& U, GaugeField& dSdU)
{
assert( &U == smearer );
smearer->logDetJacobianForce(dSdU);
}
private:
};
NAMESPACE_END(Grid);