gftool.basis.pole.PoleGf

class gftool.basis.pole.PoleGf(poles: ndarray, residues: ndarray)

Fermionic Green’s function given by finite number of poles and residues.

Parameters:

poles, residues(…, N) complex np.ndarray

Poles and residues of the function.

__init__(*args, **kwargs)

Methods

__init__(*args, **kwargs)
count(value, /)	Return number of occurrences of value.
eval_ret_t(tt)	Evaluate the retarded time Green's function.
eval_tau(tau, beta)	Evaluate the imaginary time Green's function.
eval_z(z)	Evaluate the function at z.
from_moments(moments[, width])	Generate instance matching high-frequency moments.
from_tau(gf_tau, n_pole, beta[, moments, ...])	Generate instance fitting gf_tau.
from_z(z, gf_z, n_pole[, moments, width, weight])	Generate instance fitting gf_z.
index(value[, start, stop])	Return first index of value.
moments(order)	Calculate high-frequency moments of order.
occ(beta)	Calculate the occupation number.

Attributes

poles	Alias for field number 0
residues	Alias for field number 1