triqs.operators.util.extractors.op_from_block_matrix

triqs.operators.util.extractors.op_from_block_matrix()

Dispatched C++ function(s).

[1] (bl_mat: ndarray[ndarray[float | complex, 2], 1], gf_struct: [tuple[str, int]])
  -> Operator

Build a block-diagonal quadratic operator from its block-matrix representation.

Given the block matrices \(h_{\sigma ij}\) and the block structure, returns

\[\hat{h} = \sum_{\sigma ij} h_{\sigma ij} \hat{c}_{\sigma, i}^\dagger \hat{c}_{\sigma, j} \; .\]

Parameters:

bl_matndarray[ndarray[float | complex, 2], 1]: One matrix \(h_{\sigma ij}\) per block \(\sigma\), packaged as a one-dimensional array of matrices.
gf_struct[tuple[str, int]]: Block structure specifying the block labels and the size of each block.

Returns: