DTM NdnNdn( const std::vector<Basis> &Bases,
const DTV &Vec, Hamiltonian<DT> &ham ){
DTM out = DTM::Zero(
Bases.at(0).getL(), Bases.at(1).getL() );
std::vector< int > f1 = Bases.at(0).getFStates();
std::vector< int > f2 = Bases.at(1).getFStates();
size_t f1id = 0, f2id = 0;
for ( int &nf2 : f2 ){
std::vector<size_t> ids(2,f2id);
f1id = 0;
for ( int &nf1 : f1 ){
ids.at(0) = f1id;
size_t id = ham.DetermineTotalIndex(ids);
for (size_t cnt1 = 0; cnt1 < Bases.at(1).getL(); cnt1++) {
for (size_t cnt2 = 0; cnt2 < Bases.at(1).getL(); cnt2++) {
if ( btest(nf2, cnt1) && btest(nf2, cnt2) ) {
out(cnt1, cnt2) += std::pow(std::abs(Vec(id)), 2);//Vec(id) * std::conj( Vec(id) );
}
}
}
f1id++;
}
f2id++;
}
return out;
}
std::vector< DTV > Ni( const std::vector<Basis> &Bases,
const DTV &Vec, Hamiltonian<DT> &ham ){
std::vector< DTV > out;
DTV tmp1 = DTV::Zero(Bases.at(0).getL());//(Bases.at(0).getL(), 0.0e0);
DTV tmp2 = DTV::Zero(Bases.at(1).getL());//(Bases.at(1).getL(), 0.0e0);
std::vector< int > f1 = Bases.at(0).getFStates();
std::vector< int > f2 = Bases.at(1).getFStates();
size_t f1id = 0, f2id = 0;
for ( int &nf2 : f2 ){
std::vector<size_t> ids(2,f2id);
f1id = 0;
for ( int &nf1 : f1 ){
ids.at(0) = f1id;
size_t id = ham.DetermineTotalIndex(ids);
for (size_t cnt = 0; cnt < Bases.at(0).getL(); cnt++) {
if ( btest(nf1, cnt) ) tmp1(cnt) += std::pow(std::abs(Vec(id)), 2);//Vec(id) * std::conj( Vec(id) );
}
for (size_t cnt = 0; cnt < Bases.at(1).getL(); cnt++) {
if ( btest(nf2, cnt) ) tmp2(cnt) += std::pow(std::abs(Vec(id)), 2);//Vec(id) * std::conj( Vec(id) );
}
f1id++;
}
f2id++;
}
out.push_back(tmp1);
out.push_back(tmp2);
return out;
}