Spin-half fermion Model#

class spinhalf

Model for a single orbital with spin up and down f operator. SIAM can made entirely from this class.

Each Model class should have f_dag_operator, eigenvalues_Q, chi_Q, n_Q.

Public Functions

inline spinhalf(double teps, double tUint, double tmag = 0)
Parameters:

  • teps – : \(\epsilon_d \) is onsite energy of the SIAM

  • tUint – U Columb interaction of SIAM

  • tmag – : Magnetic field of SIAM

inline auto getDoubleOcc() const

Double Occupancy of the site as operator. Not needed for the SIAM model build. Usefull for the static or dynamic calculation.

Returns:

Public Members

std::vector<qOperator> f_dag_operator

\( f^\dagger\) operator

std::vector<std::vector<double>> eigenvalues_Q

Eigenvalues of the Hamiltonian.

std::vector<double> chi_Q

Fermion sign of the each basis states. \( (-1)^ {n_{particle}}\).

std::vector<std::vector<int>> n_Q

Quantum numbers of the basis states.