gftool.siam.hybrid_z

gftool.siam.hybrid_z(z, e_bath, hopping_sqr)

Hybridization function of the impurity.

Parameters:

z : (…) complex np.ndarray

Complex frequency variable.

e_bath : (…, Nb) float np.ndarray

On-site energy of the bath sites.

hopping : (…, Nb) complex np.ndarray

Hopping matrix element between impurity and the bath sites.

Returns:

hybrid_z : (…) complex np.ndarray

Hybridization function of the impurity site.