gftool.matrix.UDecomposition.from_gf
- classmethod UDecomposition.from_gf(gf) Decomposition
Decompose the inverse Green’s function matrix.
The similarity transformation:
\[G^{-1} = P g P^{-1}, \quad g = diag(λ_l)\]- Parameters:
- gf(…, N, N) complex np.ndarray
Matrix to be decomposed.
- Returns:
- Decomposition