triqs.gfs.block_gf.BlockGf.density

BlockGf.density(*args, **kwargs)[source]

Compute per-block single-particle density matrices.

Equivalent to \(\langle c^\dagger_i c_j \rangle\) evaluated per block from the diagonal-frequency / equal-time limit of the block Green’s function.

Parameters:
*args, **kwargs

Forwarded to density() for each block.

Returns:
dict of {strnumpy.ndarray}

Mapping block_name -> density_matrix.