High-Frequency moments of the Green’s function
The coefficients of the high-frequency expansion of a Green function (in short tail) play an essential role in acquiring accurate results for e.g. Fourier transforms and density calculations.
The TRIQS library provides functionalities to determine these tail coefficiencts through a least-square fitting procedure.
In Python, the
fit_tail functions are not free but are rather member functions of the respective
The functionality is otherwise identical to C++.