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Hadrons: moving Hadrons to root directory, build system improvements
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366
Grid/qcd/action/fermion/WilsonCloverFermion.h
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366
Grid/qcd/action/fermion/WilsonCloverFermion.h
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/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/qcd/action/fermion/WilsonCloverFermion.h
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Copyright (C) 2017
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Author: Guido Cossu <guido.cossu@ed.ac.uk>
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Author: David Preti <>
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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 GRID_QCD_WILSON_CLOVER_FERMION_H
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#define GRID_QCD_WILSON_CLOVER_FERMION_H
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#include <Grid/Grid.h>
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namespace Grid
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{
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namespace QCD
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{
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///////////////////////////////////////////////////////////////////
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// Wilson Clover
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//
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// Operator ( with anisotropy coefficients):
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//
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// Q = 1 + (Nd-1)/xi_0 + m
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// + W_t + (nu/xi_0) * W_s
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// - 1/2*[ csw_t * sum_s (sigma_ts F_ts) + (csw_s/xi_0) * sum_ss (sigma_ss F_ss) ]
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//
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// s spatial, t temporal directions.
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// where W_t and W_s are the temporal and spatial components of the
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// Wilson Dirac operator
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//
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// csw_r = csw_t to recover the isotropic version
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//////////////////////////////////////////////////////////////////
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template <class Impl>
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class WilsonCloverFermion : public WilsonFermion<Impl>
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{
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public:
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// Types definitions
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INHERIT_IMPL_TYPES(Impl);
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template <typename vtype>
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using iImplClover = iScalar<iMatrix<iMatrix<vtype, Impl::Dimension>, Ns>>;
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typedef iImplClover<Simd> SiteCloverType;
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typedef Lattice<SiteCloverType> CloverFieldType;
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public:
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typedef WilsonFermion<Impl> WilsonBase;
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virtual void Instantiatable(void){};
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// Constructors
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WilsonCloverFermion(GaugeField &_Umu, GridCartesian &Fgrid,
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GridRedBlackCartesian &Hgrid,
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const RealD _mass,
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const RealD _csw_r = 0.0,
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const RealD _csw_t = 0.0,
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const WilsonAnisotropyCoefficients &clover_anisotropy = WilsonAnisotropyCoefficients(),
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const ImplParams &impl_p = ImplParams()) : WilsonFermion<Impl>(_Umu,
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Fgrid,
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Hgrid,
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_mass, impl_p, clover_anisotropy),
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CloverTerm(&Fgrid),
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CloverTermInv(&Fgrid),
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CloverTermEven(&Hgrid),
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CloverTermOdd(&Hgrid),
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CloverTermInvEven(&Hgrid),
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CloverTermInvOdd(&Hgrid),
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CloverTermDagEven(&Hgrid),
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CloverTermDagOdd(&Hgrid),
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CloverTermInvDagEven(&Hgrid),
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CloverTermInvDagOdd(&Hgrid)
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{
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assert(Nd == 4); // require 4 dimensions
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if (clover_anisotropy.isAnisotropic)
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{
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csw_r = _csw_r * 0.5 / clover_anisotropy.xi_0;
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diag_mass = _mass + 1.0 + (Nd - 1) * (clover_anisotropy.nu / clover_anisotropy.xi_0);
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}
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else
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{
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csw_r = _csw_r * 0.5;
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diag_mass = 4.0 + _mass;
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}
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csw_t = _csw_t * 0.5;
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if (csw_r == 0)
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std::cout << GridLogWarning << "Initializing WilsonCloverFermion with csw_r = 0" << std::endl;
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if (csw_t == 0)
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std::cout << GridLogWarning << "Initializing WilsonCloverFermion with csw_t = 0" << std::endl;
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ImportGauge(_Umu);
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}
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virtual RealD M(const FermionField &in, FermionField &out);
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virtual RealD Mdag(const FermionField &in, FermionField &out);
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virtual void Mooee(const FermionField &in, FermionField &out);
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virtual void MooeeDag(const FermionField &in, FermionField &out);
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virtual void MooeeInv(const FermionField &in, FermionField &out);
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virtual void MooeeInvDag(const FermionField &in, FermionField &out);
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virtual void MooeeInternal(const FermionField &in, FermionField &out, int dag, int inv);
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//virtual void MDeriv(GaugeField &mat, const FermionField &U, const FermionField &V, int dag);
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virtual void MooDeriv(GaugeField &mat, const FermionField &U, const FermionField &V, int dag);
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virtual void MeeDeriv(GaugeField &mat, const FermionField &U, const FermionField &V, int dag);
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void ImportGauge(const GaugeField &_Umu);
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// Derivative parts unpreconditioned pseudofermions
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void MDeriv(GaugeField &force, const FermionField &X, const FermionField &Y, int dag)
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{
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conformable(X._grid, Y._grid);
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conformable(X._grid, force._grid);
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GaugeLinkField force_mu(force._grid), lambda(force._grid);
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GaugeField clover_force(force._grid);
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PropagatorField Lambda(force._grid);
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// Guido: Here we are hitting some performance issues:
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// need to extract the components of the DoubledGaugeField
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// for each call
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// Possible solution
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// Create a vector object to store them? (cons: wasting space)
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std::vector<GaugeLinkField> U(Nd, this->Umu._grid);
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Impl::extractLinkField(U, this->Umu);
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force = zero;
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// Derivative of the Wilson hopping term
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this->DhopDeriv(force, X, Y, dag);
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///////////////////////////////////////////////////////////
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// Clover term derivative
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///////////////////////////////////////////////////////////
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Impl::outerProductImpl(Lambda, X, Y);
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//std::cout << "Lambda:" << Lambda << std::endl;
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Gamma::Algebra sigma[] = {
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Gamma::Algebra::SigmaXY,
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Gamma::Algebra::SigmaXZ,
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Gamma::Algebra::SigmaXT,
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Gamma::Algebra::MinusSigmaXY,
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Gamma::Algebra::SigmaYZ,
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Gamma::Algebra::SigmaYT,
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Gamma::Algebra::MinusSigmaXZ,
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Gamma::Algebra::MinusSigmaYZ,
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Gamma::Algebra::SigmaZT,
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Gamma::Algebra::MinusSigmaXT,
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Gamma::Algebra::MinusSigmaYT,
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Gamma::Algebra::MinusSigmaZT};
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/*
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sigma_{\mu \nu}=
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| 0 sigma[0] sigma[1] sigma[2] |
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| sigma[3] 0 sigma[4] sigma[5] |
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| sigma[6] sigma[7] 0 sigma[8] |
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| sigma[9] sigma[10] sigma[11] 0 |
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*/
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int count = 0;
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clover_force = zero;
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for (int mu = 0; mu < 4; mu++)
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{
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force_mu = zero;
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for (int nu = 0; nu < 4; nu++)
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{
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if (mu == nu)
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continue;
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RealD factor;
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if (nu == 4 || mu == 4)
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{
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factor = 2.0 * csw_t;
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}
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else
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{
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factor = 2.0 * csw_r;
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}
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PropagatorField Slambda = Gamma(sigma[count]) * Lambda; // sigma checked
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Impl::TraceSpinImpl(lambda, Slambda); // traceSpin ok
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force_mu -= factor*Cmunu(U, lambda, mu, nu); // checked
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count++;
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}
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pokeLorentz(clover_force, U[mu] * force_mu, mu);
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}
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//clover_force *= csw;
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force += clover_force;
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}
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// Computing C_{\mu \nu}(x) as in Eq.(B.39) in Zbigniew Sroczynski's PhD thesis
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GaugeLinkField Cmunu(std::vector<GaugeLinkField> &U, GaugeLinkField &lambda, int mu, int nu)
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{
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conformable(lambda._grid, U[0]._grid);
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GaugeLinkField out(lambda._grid), tmp(lambda._grid);
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// insertion in upper staple
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// please check redundancy of shift operations
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// C1+
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tmp = lambda * U[nu];
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out = Impl::ShiftStaple(Impl::CovShiftForward(tmp, nu, Impl::CovShiftBackward(U[mu], mu, Impl::CovShiftIdentityBackward(U[nu], nu))), mu);
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// C2+
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tmp = U[mu] * Impl::ShiftStaple(adj(lambda), mu);
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out += Impl::ShiftStaple(Impl::CovShiftForward(U[nu], nu, Impl::CovShiftBackward(tmp, mu, Impl::CovShiftIdentityBackward(U[nu], nu))), mu);
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// C3+
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tmp = U[nu] * Impl::ShiftStaple(adj(lambda), nu);
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out += Impl::ShiftStaple(Impl::CovShiftForward(U[nu], nu, Impl::CovShiftBackward(U[mu], mu, Impl::CovShiftIdentityBackward(tmp, nu))), mu);
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// C4+
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out += Impl::ShiftStaple(Impl::CovShiftForward(U[nu], nu, Impl::CovShiftBackward(U[mu], mu, Impl::CovShiftIdentityBackward(U[nu], nu))), mu) * lambda;
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// insertion in lower staple
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// C1-
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out -= Impl::ShiftStaple(lambda, mu) * Impl::ShiftStaple(Impl::CovShiftBackward(U[nu], nu, Impl::CovShiftBackward(U[mu], mu, U[nu])), mu);
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// C2-
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tmp = adj(lambda) * U[nu];
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out -= Impl::ShiftStaple(Impl::CovShiftBackward(tmp, nu, Impl::CovShiftBackward(U[mu], mu, U[nu])), mu);
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// C3-
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tmp = lambda * U[nu];
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out -= Impl::ShiftStaple(Impl::CovShiftBackward(U[nu], nu, Impl::CovShiftBackward(U[mu], mu, tmp)), mu);
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// C4-
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out -= Impl::ShiftStaple(Impl::CovShiftBackward(U[nu], nu, Impl::CovShiftBackward(U[mu], mu, U[nu])), mu) * lambda;
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return out;
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}
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private:
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// here fixing the 4 dimensions, make it more general?
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RealD csw_r; // Clover coefficient - spatial
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RealD csw_t; // Clover coefficient - temporal
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RealD diag_mass; // Mass term
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CloverFieldType CloverTerm, CloverTermInv; // Clover term
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CloverFieldType CloverTermEven, CloverTermOdd; // Clover term EO
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CloverFieldType CloverTermInvEven, CloverTermInvOdd; // Clover term Inv EO
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CloverFieldType CloverTermDagEven, CloverTermDagOdd; // Clover term Dag EO
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CloverFieldType CloverTermInvDagEven, CloverTermInvDagOdd; // Clover term Inv Dag EO
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// eventually these can be compressed into 6x6 blocks instead of the 12x12
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// using the DeGrand-Rossi basis for the gamma matrices
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CloverFieldType fillCloverYZ(const GaugeLinkField &F)
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{
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CloverFieldType T(F._grid);
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T = zero;
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PARALLEL_FOR_LOOP
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for (int i = 0; i < CloverTerm._grid->oSites(); i++)
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{
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T._odata[i]()(0, 1) = timesMinusI(F._odata[i]()());
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T._odata[i]()(1, 0) = timesMinusI(F._odata[i]()());
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T._odata[i]()(2, 3) = timesMinusI(F._odata[i]()());
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T._odata[i]()(3, 2) = timesMinusI(F._odata[i]()());
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}
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return T;
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}
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CloverFieldType fillCloverXZ(const GaugeLinkField &F)
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{
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CloverFieldType T(F._grid);
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T = zero;
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PARALLEL_FOR_LOOP
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for (int i = 0; i < CloverTerm._grid->oSites(); i++)
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{
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T._odata[i]()(0, 1) = -F._odata[i]()();
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T._odata[i]()(1, 0) = F._odata[i]()();
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T._odata[i]()(2, 3) = -F._odata[i]()();
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T._odata[i]()(3, 2) = F._odata[i]()();
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}
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return T;
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}
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CloverFieldType fillCloverXY(const GaugeLinkField &F)
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{
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CloverFieldType T(F._grid);
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T = zero;
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PARALLEL_FOR_LOOP
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for (int i = 0; i < CloverTerm._grid->oSites(); i++)
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{
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T._odata[i]()(0, 0) = timesMinusI(F._odata[i]()());
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T._odata[i]()(1, 1) = timesI(F._odata[i]()());
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T._odata[i]()(2, 2) = timesMinusI(F._odata[i]()());
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T._odata[i]()(3, 3) = timesI(F._odata[i]()());
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}
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return T;
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}
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CloverFieldType fillCloverXT(const GaugeLinkField &F)
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{
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CloverFieldType T(F._grid);
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T = zero;
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PARALLEL_FOR_LOOP
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for (int i = 0; i < CloverTerm._grid->oSites(); i++)
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{
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T._odata[i]()(0, 1) = timesI(F._odata[i]()());
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T._odata[i]()(1, 0) = timesI(F._odata[i]()());
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T._odata[i]()(2, 3) = timesMinusI(F._odata[i]()());
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T._odata[i]()(3, 2) = timesMinusI(F._odata[i]()());
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}
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return T;
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}
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CloverFieldType fillCloverYT(const GaugeLinkField &F)
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{
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CloverFieldType T(F._grid);
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T = zero;
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PARALLEL_FOR_LOOP
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for (int i = 0; i < CloverTerm._grid->oSites(); i++)
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{
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T._odata[i]()(0, 1) = -(F._odata[i]()());
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T._odata[i]()(1, 0) = (F._odata[i]()());
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T._odata[i]()(2, 3) = (F._odata[i]()());
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T._odata[i]()(3, 2) = -(F._odata[i]()());
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}
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return T;
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}
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CloverFieldType fillCloverZT(const GaugeLinkField &F)
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{
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CloverFieldType T(F._grid);
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T = zero;
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PARALLEL_FOR_LOOP
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for (int i = 0; i < CloverTerm._grid->oSites(); i++)
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{
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T._odata[i]()(0, 0) = timesI(F._odata[i]()());
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T._odata[i]()(1, 1) = timesMinusI(F._odata[i]()());
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T._odata[i]()(2, 2) = timesMinusI(F._odata[i]()());
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T._odata[i]()(3, 3) = timesI(F._odata[i]()());
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}
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return T;
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}
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};
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}
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}
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#endif // GRID_QCD_WILSON_CLOVER_FERMION_H
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