RealBaseSum

Base class: Operator

The QuadraticSum operator is parametrized by a sparse matrix $S(i,j)$ of size $2L \times 2L$. The operator represents the sum $\sum_{i,j}S_{i,j}^{+,-}f_i^{\dagger}f_j + S_{i,j}^{-,+}f_if_j^{\dagger} + S_{i,j}^{+,+}f_i^{\dagger}f_j^{\dagger} + S_{i,j}^{-,-}f_if_j$ with $S =\begin{pmatrix}S^{+,-}, S^{+,+} \\ S^{-,-}, S^{-,+} \end{pmatrix}$

Derived Types

• RealPairingSum
• RealQuadraticSum
• RealTransferSum

Members

Name	Description
get_bdg_matrix	Constructs the Bogoliubov-De Gennes matrix representation of the operator.
get_bdg_shift	Extracts the energy shift C from the quadratic operator.