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@ -1,4 +1,4 @@
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/*************************************************************************************
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/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Grid physics library, www.github.com/paboyle/Grid
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@ -23,245 +23,243 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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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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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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*************************************************************************************/
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/* END LEGAL */
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/* END LEGAL */
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#ifndef QCD_PSEUDOFERMION_ONE_FLAVOUR_RATIONAL_RATIO_H
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#ifndef QCD_PSEUDOFERMION_ONE_FLAVOUR_RATIONAL_RATIO_H
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#define QCD_PSEUDOFERMION_ONE_FLAVOUR_RATIONAL_RATIO_H
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#define QCD_PSEUDOFERMION_ONE_FLAVOUR_RATIONAL_RATIO_H
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namespace Grid{
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NAMESPACE_BEGIN(Grid);
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namespace QCD{
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///////////////////////////////////////
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// One flavour rational
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///////////////////////////////////////
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///////////////////////////////////////
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// S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi
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// One flavour rational
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//
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///////////////////////////////////////
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// Here P/Q \sim R_{1/4} ~ (V^dagV)^{1/4}
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// Here N/D \sim R_{-1/2} ~ (M^dagM)^{-1/2}
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template<class Impl>
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class OneFlavourRatioRationalPseudoFermionAction : public Action<typename Impl::GaugeField> {
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public:
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INHERIT_IMPL_TYPES(Impl);
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typedef OneFlavourRationalParams Params;
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Params param;
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MultiShiftFunction PowerHalf ;
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MultiShiftFunction PowerNegHalf;
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MultiShiftFunction PowerQuarter;
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MultiShiftFunction PowerNegQuarter;
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private:
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FermionOperator<Impl> & NumOp;// the basic operator
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FermionOperator<Impl> & DenOp;// the basic operator
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FermionField Phi; // the pseudo fermion field for this trajectory
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public:
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OneFlavourRatioRationalPseudoFermionAction(FermionOperator<Impl> &_NumOp,
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FermionOperator<Impl> &_DenOp,
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Params & p
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) : NumOp(_NumOp), DenOp(_DenOp), Phi(_NumOp.FermionGrid()), param(p)
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{
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AlgRemez remez(param.lo,param.hi,param.precision);
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// MdagM^(+- 1/2)
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std::cout<<GridLogMessage << "Generating degree "<<param.degree<<" for x^(1/2)"<<std::endl;
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remez.generateApprox(param.degree,1,2);
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PowerHalf.Init(remez,param.tolerance,false);
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PowerNegHalf.Init(remez,param.tolerance,true);
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// MdagM^(+- 1/4)
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std::cout<<GridLogMessage << "Generating degree "<<param.degree<<" for x^(1/4)"<<std::endl;
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remez.generateApprox(param.degree,1,4);
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PowerQuarter.Init(remez,param.tolerance,false);
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PowerNegQuarter.Init(remez,param.tolerance,true);
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};
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virtual std::string action_name(){return "OneFlavourRatioRationalPseudoFermionAction";}
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virtual std::string LogParameters(){
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std::stringstream sstream;
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sstream << GridLogMessage << "["<<action_name()<<"] Low :" << param.lo << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] High :" << param.hi << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] Max iterations :" << param.MaxIter << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] Tolerance :" << param.tolerance << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] Degree :" << param.degree << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] Precision :" << param.precision << std::endl;
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return sstream.str();
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}
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virtual void refresh(const GaugeField &U, GridParallelRNG& pRNG) {
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// S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi
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// S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi
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//
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//
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// Here P/Q \sim R_{1/4} ~ (V^dagV)^{1/4}
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// P(phi) = e^{- phi^dag (VdagV)^1/4 (MdagM)^-1/2 (VdagV)^1/4 phi}
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// Here N/D \sim R_{-1/2} ~ (M^dagM)^{-1/2}
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// = e^{- phi^dag (VdagV)^1/4 (MdagM)^-1/4 (MdagM)^-1/4 (VdagV)^1/4 phi}
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//
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template<class Impl>
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// Phi = (VdagV)^-1/4 Mdag^{1/4} eta
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class OneFlavourRatioRationalPseudoFermionAction : public Action<typename Impl::GaugeField> {
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//
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public:
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// P(eta) = e^{- eta^dag eta}
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//
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// e^{x^2/2 sig^2} => sig^2 = 0.5.
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//
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// So eta should be of width sig = 1/sqrt(2).
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INHERIT_IMPL_TYPES(Impl);
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RealD scale = std::sqrt(0.5);
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typedef OneFlavourRationalParams Params;
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FermionField tmp(NumOp.FermionGrid());
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Params param;
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FermionField eta(NumOp.FermionGrid());
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MultiShiftFunction PowerHalf ;
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gaussian(pRNG,eta);
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MultiShiftFunction PowerNegHalf;
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MultiShiftFunction PowerQuarter;
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MultiShiftFunction PowerNegQuarter;
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private:
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NumOp.ImportGauge(U);
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DenOp.ImportGauge(U);
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FermionOperator<Impl> & NumOp;// the basic operator
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FermionOperator<Impl> & DenOp;// the basic operator
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FermionField Phi; // the pseudo fermion field for this trajectory
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public:
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// MdagM^1/4 eta
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MdagMLinearOperator<FermionOperator<Impl> ,FermionField> MdagM(DenOp);
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ConjugateGradientMultiShift<FermionField> msCG_M(param.MaxIter,PowerQuarter);
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msCG_M(MdagM,eta,tmp);
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OneFlavourRatioRationalPseudoFermionAction(FermionOperator<Impl> &_NumOp,
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// VdagV^-1/4 MdagM^1/4 eta
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FermionOperator<Impl> &_DenOp,
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MdagMLinearOperator<FermionOperator<Impl> ,FermionField> VdagV(NumOp);
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Params & p
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ConjugateGradientMultiShift<FermionField> msCG_V(param.MaxIter,PowerNegQuarter);
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) : NumOp(_NumOp), DenOp(_DenOp), Phi(_NumOp.FermionGrid()), param(p)
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msCG_V(VdagV,tmp,Phi);
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{
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AlgRemez remez(param.lo,param.hi,param.precision);
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// MdagM^(+- 1/2)
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Phi=Phi*scale;
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std::cout<<GridLogMessage << "Generating degree "<<param.degree<<" for x^(1/2)"<<std::endl;
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remez.generateApprox(param.degree,1,2);
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PowerHalf.Init(remez,param.tolerance,false);
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PowerNegHalf.Init(remez,param.tolerance,true);
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// MdagM^(+- 1/4)
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std::cout<<GridLogMessage << "Generating degree "<<param.degree<<" for x^(1/4)"<<std::endl;
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remez.generateApprox(param.degree,1,4);
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PowerQuarter.Init(remez,param.tolerance,false);
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PowerNegQuarter.Init(remez,param.tolerance,true);
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};
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virtual std::string action_name(){return "OneFlavourRatioRationalPseudoFermionAction";}
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virtual std::string LogParameters(){
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std::stringstream sstream;
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sstream << GridLogMessage << "["<<action_name()<<"] Low :" << param.lo << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] High :" << param.hi << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] Max iterations :" << param.MaxIter << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] Tolerance :" << param.tolerance << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] Degree :" << param.degree << std::endl;
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sstream << GridLogMessage << "["<<action_name()<<"] Precision :" << param.precision << std::endl;
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return sstream.str();
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}
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virtual void refresh(const GaugeField &U, GridParallelRNG& pRNG) {
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// S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi
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//
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// P(phi) = e^{- phi^dag (VdagV)^1/4 (MdagM)^-1/2 (VdagV)^1/4 phi}
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// = e^{- phi^dag (VdagV)^1/4 (MdagM)^-1/4 (MdagM)^-1/4 (VdagV)^1/4 phi}
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//
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// Phi = (VdagV)^-1/4 Mdag^{1/4} eta
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//
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// P(eta) = e^{- eta^dag eta}
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//
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// e^{x^2/2 sig^2} => sig^2 = 0.5.
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//
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// So eta should be of width sig = 1/sqrt(2).
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RealD scale = std::sqrt(0.5);
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FermionField tmp(NumOp.FermionGrid());
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FermionField eta(NumOp.FermionGrid());
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gaussian(pRNG,eta);
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NumOp.ImportGauge(U);
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DenOp.ImportGauge(U);
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// MdagM^1/4 eta
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MdagMLinearOperator<FermionOperator<Impl> ,FermionField> MdagM(DenOp);
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ConjugateGradientMultiShift<FermionField> msCG_M(param.MaxIter,PowerQuarter);
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msCG_M(MdagM,eta,tmp);
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// VdagV^-1/4 MdagM^1/4 eta
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MdagMLinearOperator<FermionOperator<Impl> ,FermionField> VdagV(NumOp);
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ConjugateGradientMultiShift<FermionField> msCG_V(param.MaxIter,PowerNegQuarter);
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msCG_V(VdagV,tmp,Phi);
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Phi=Phi*scale;
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};
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};
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//////////////////////////////////////////////////////
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//////////////////////////////////////////////////////
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// S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi
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// S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi
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//////////////////////////////////////////////////////
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//////////////////////////////////////////////////////
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virtual RealD S(const GaugeField &U) {
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virtual RealD S(const GaugeField &U) {
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NumOp.ImportGauge(U);
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NumOp.ImportGauge(U);
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DenOp.ImportGauge(U);
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DenOp.ImportGauge(U);
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FermionField X(NumOp.FermionGrid());
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FermionField X(NumOp.FermionGrid());
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FermionField Y(NumOp.FermionGrid());
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FermionField Y(NumOp.FermionGrid());
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// VdagV^1/4 Phi
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// VdagV^1/4 Phi
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MdagMLinearOperator<FermionOperator<Impl> ,FermionField> VdagV(NumOp);
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MdagMLinearOperator<FermionOperator<Impl> ,FermionField> VdagV(NumOp);
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ConjugateGradientMultiShift<FermionField> msCG_V(param.MaxIter,PowerQuarter);
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ConjugateGradientMultiShift<FermionField> msCG_V(param.MaxIter,PowerQuarter);
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msCG_V(VdagV,Phi,X);
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msCG_V(VdagV,Phi,X);
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// MdagM^-1/4 VdagV^1/4 Phi
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// MdagM^-1/4 VdagV^1/4 Phi
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MdagMLinearOperator<FermionOperator<Impl> ,FermionField> MdagM(DenOp);
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MdagMLinearOperator<FermionOperator<Impl> ,FermionField> MdagM(DenOp);
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ConjugateGradientMultiShift<FermionField> msCG_M(param.MaxIter,PowerNegQuarter);
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ConjugateGradientMultiShift<FermionField> msCG_M(param.MaxIter,PowerNegQuarter);
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msCG_M(MdagM,X,Y);
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msCG_M(MdagM,X,Y);
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// Phidag VdagV^1/4 MdagM^-1/4 MdagM^-1/4 VdagV^1/4 Phi
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// Phidag VdagV^1/4 MdagM^-1/4 MdagM^-1/4 VdagV^1/4 Phi
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RealD action = norm2(Y);
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RealD action = norm2(Y);
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return action;
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return action;
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};
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};
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// S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi
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// S_f = chi^dag* P(V^dag*V)/Q(V^dag*V)* N(M^dag*M)/D(M^dag*M)* P(V^dag*V)/Q(V^dag*V)* chi
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//
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//
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// Here, M is some 5D operator and V is the Pauli-Villars field
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// Here, M is some 5D operator and V is the Pauli-Villars field
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// N and D makeup the rat. poly of the M term and P and & makeup the rat.poly of the denom term
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// N and D makeup the rat. poly of the M term and P and & makeup the rat.poly of the denom term
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//
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//
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// Need
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// Need
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// dS_f/dU = chi^dag d[P/Q] N/D P/Q chi
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// dS_f/dU = chi^dag d[P/Q] N/D P/Q chi
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// + chi^dag P/Q d[N/D] P/Q chi
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// + chi^dag P/Q d[N/D] P/Q chi
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// + chi^dag P/Q N/D d[P/Q] chi
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// + chi^dag P/Q N/D d[P/Q] chi
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//
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//
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// P/Q is expressed as partial fraction expansion:
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// P/Q is expressed as partial fraction expansion:
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//
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//
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// a0 + \sum_k ak/(V^dagV + bk)
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// a0 + \sum_k ak/(V^dagV + bk)
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//
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//
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// d[P/Q] is then
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// d[P/Q] is then
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//
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//
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// \sum_k -ak [V^dagV+bk]^{-1} [ dV^dag V + V^dag dV ] [V^dag V + bk]^{-1}
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// \sum_k -ak [V^dagV+bk]^{-1} [ dV^dag V + V^dag dV ] [V^dag V + bk]^{-1}
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//
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//
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// and similar for N/D.
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// and similar for N/D.
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//
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//
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// Need
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// Need
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// MpvPhi_k = [Vdag V + bk]^{-1} chi
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// MpvPhi_k = [Vdag V + bk]^{-1} chi
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// MpvPhi = {a0 + \sum_k ak [Vdag V + bk]^{-1} }chi
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// MpvPhi = {a0 + \sum_k ak [Vdag V + bk]^{-1} }chi
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//
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//
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// MfMpvPhi_k = [MdagM+bk]^{-1} MpvPhi
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// MfMpvPhi_k = [MdagM+bk]^{-1} MpvPhi
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// MfMpvPhi = {a0 + \sum_k ak [Mdag M + bk]^{-1} } MpvPhi
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// MfMpvPhi = {a0 + \sum_k ak [Mdag M + bk]^{-1} } MpvPhi
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//
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//
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// MpvMfMpvPhi_k = [Vdag V + bk]^{-1} MfMpvchi
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// MpvMfMpvPhi_k = [Vdag V + bk]^{-1} MfMpvchi
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//
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//
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virtual void deriv(const GaugeField &U,GaugeField & dSdU) {
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virtual void deriv(const GaugeField &U,GaugeField & dSdU) {
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const int n_f = PowerNegHalf.poles.size();
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const int n_f = PowerNegHalf.poles.size();
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const int n_pv = PowerQuarter.poles.size();
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const int n_pv = PowerQuarter.poles.size();
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std::vector<FermionField> MpvPhi_k (n_pv,NumOp.FermionGrid());
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std::vector<FermionField> MpvPhi_k (n_pv,NumOp.FermionGrid());
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std::vector<FermionField> MpvMfMpvPhi_k(n_pv,NumOp.FermionGrid());
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std::vector<FermionField> MpvMfMpvPhi_k(n_pv,NumOp.FermionGrid());
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std::vector<FermionField> MfMpvPhi_k (n_f,NumOp.FermionGrid());
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std::vector<FermionField> MfMpvPhi_k (n_f,NumOp.FermionGrid());
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FermionField MpvPhi(NumOp.FermionGrid());
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FermionField MpvPhi(NumOp.FermionGrid());
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FermionField MfMpvPhi(NumOp.FermionGrid());
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FermionField MfMpvPhi(NumOp.FermionGrid());
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FermionField MpvMfMpvPhi(NumOp.FermionGrid());
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FermionField MpvMfMpvPhi(NumOp.FermionGrid());
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FermionField Y(NumOp.FermionGrid());
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FermionField Y(NumOp.FermionGrid());
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GaugeField tmp(NumOp.GaugeGrid());
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GaugeField tmp(NumOp.GaugeGrid());
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NumOp.ImportGauge(U);
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NumOp.ImportGauge(U);
|
||||||
DenOp.ImportGauge(U);
|
DenOp.ImportGauge(U);
|
||||||
|
|
||||||
MdagMLinearOperator<FermionOperator<Impl> ,FermionField> MdagM(DenOp);
|
MdagMLinearOperator<FermionOperator<Impl> ,FermionField> MdagM(DenOp);
|
||||||
MdagMLinearOperator<FermionOperator<Impl> ,FermionField> VdagV(NumOp);
|
MdagMLinearOperator<FermionOperator<Impl> ,FermionField> VdagV(NumOp);
|
||||||
|
|
||||||
ConjugateGradientMultiShift<FermionField> msCG_V(param.MaxIter,PowerQuarter);
|
ConjugateGradientMultiShift<FermionField> msCG_V(param.MaxIter,PowerQuarter);
|
||||||
ConjugateGradientMultiShift<FermionField> msCG_M(param.MaxIter,PowerNegHalf);
|
ConjugateGradientMultiShift<FermionField> msCG_M(param.MaxIter,PowerNegHalf);
|
||||||
|
|
||||||
msCG_V(VdagV,Phi,MpvPhi_k,MpvPhi);
|
msCG_V(VdagV,Phi,MpvPhi_k,MpvPhi);
|
||||||
msCG_M(MdagM,MpvPhi,MfMpvPhi_k,MfMpvPhi);
|
msCG_M(MdagM,MpvPhi,MfMpvPhi_k,MfMpvPhi);
|
||||||
msCG_V(VdagV,MfMpvPhi,MpvMfMpvPhi_k,MpvMfMpvPhi);
|
msCG_V(VdagV,MfMpvPhi,MpvMfMpvPhi_k,MpvMfMpvPhi);
|
||||||
|
|
||||||
RealD ak;
|
RealD ak;
|
||||||
|
|
||||||
dSdU = zero;
|
dSdU = zero;
|
||||||
|
|
||||||
// With these building blocks
|
// With these building blocks
|
||||||
//
|
//
|
||||||
// dS/dU =
|
// dS/dU =
|
||||||
// \sum_k -ak MfMpvPhi_k^dag [ dM^dag M + M^dag dM ] MfMpvPhi_k (1)
|
// \sum_k -ak MfMpvPhi_k^dag [ dM^dag M + M^dag dM ] MfMpvPhi_k (1)
|
||||||
// + \sum_k -ak MpvMfMpvPhi_k^\dag [ dV^dag V + V^dag dV ] MpvPhi_k (2)
|
// + \sum_k -ak MpvMfMpvPhi_k^\dag [ dV^dag V + V^dag dV ] MpvPhi_k (2)
|
||||||
// -ak MpvPhi_k^dag [ dV^dag V + V^dag dV ] MpvMfMpvPhi_k (3)
|
// -ak MpvPhi_k^dag [ dV^dag V + V^dag dV ] MpvMfMpvPhi_k (3)
|
||||||
|
|
||||||
//(1)
|
//(1)
|
||||||
for(int k=0;k<n_f;k++){
|
for(int k=0;k<n_f;k++){
|
||||||
ak = PowerNegHalf.residues[k];
|
ak = PowerNegHalf.residues[k];
|
||||||
DenOp.M(MfMpvPhi_k[k],Y);
|
DenOp.M(MfMpvPhi_k[k],Y);
|
||||||
DenOp.MDeriv(tmp , MfMpvPhi_k[k], Y,DaggerYes ); dSdU=dSdU+ak*tmp;
|
DenOp.MDeriv(tmp , MfMpvPhi_k[k], Y,DaggerYes ); dSdU=dSdU+ak*tmp;
|
||||||
DenOp.MDeriv(tmp , Y, MfMpvPhi_k[k], DaggerNo ); dSdU=dSdU+ak*tmp;
|
DenOp.MDeriv(tmp , Y, MfMpvPhi_k[k], DaggerNo ); dSdU=dSdU+ak*tmp;
|
||||||
}
|
}
|
||||||
|
|
||||||
//(2)
|
//(2)
|
||||||
//(3)
|
//(3)
|
||||||
for(int k=0;k<n_pv;k++){
|
for(int k=0;k<n_pv;k++){
|
||||||
|
|
||||||
ak = PowerQuarter.residues[k];
|
ak = PowerQuarter.residues[k];
|
||||||
|
|
||||||
NumOp.M(MpvPhi_k[k],Y);
|
NumOp.M(MpvPhi_k[k],Y);
|
||||||
NumOp.MDeriv(tmp,MpvMfMpvPhi_k[k],Y,DaggerYes); dSdU=dSdU+ak*tmp;
|
NumOp.MDeriv(tmp,MpvMfMpvPhi_k[k],Y,DaggerYes); dSdU=dSdU+ak*tmp;
|
||||||
NumOp.MDeriv(tmp,Y,MpvMfMpvPhi_k[k],DaggerNo); dSdU=dSdU+ak*tmp;
|
NumOp.MDeriv(tmp,Y,MpvMfMpvPhi_k[k],DaggerNo); dSdU=dSdU+ak*tmp;
|
||||||
|
|
||||||
NumOp.M(MpvMfMpvPhi_k[k],Y); // V as we take Ydag
|
NumOp.M(MpvMfMpvPhi_k[k],Y); // V as we take Ydag
|
||||||
NumOp.MDeriv(tmp,Y, MpvPhi_k[k], DaggerNo); dSdU=dSdU+ak*tmp;
|
NumOp.MDeriv(tmp,Y, MpvPhi_k[k], DaggerNo); dSdU=dSdU+ak*tmp;
|
||||||
NumOp.MDeriv(tmp,MpvPhi_k[k], Y,DaggerYes); dSdU=dSdU+ak*tmp;
|
NumOp.MDeriv(tmp,MpvPhi_k[k], Y,DaggerYes); dSdU=dSdU+ak*tmp;
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
||||||
//dSdU = Ta(dSdU);
|
//dSdU = Ta(dSdU);
|
||||||
|
|
||||||
};
|
};
|
||||||
};
|
};
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
|
NAMESPACE_END(Grid);
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user