single_particle_greens_function

Synopsis:

triqs_tprf::g_iw_t single_particle_greens_function (int nw, double beta, double U)

Single-particle Green’s function of the Hubbard atom at half-filling

Parameters

• nw: number of Matsubara frequencies
• beta: inverse temperature
• U: Hubbard U interaction parmeter

Return value

g single-particle Green’s function of the Hubbard atom \(G(i\omega_n)\)

Documentation

Using analytical formulas from Thunstrom et al. PRB 98, 235107 (2018) please cite the paper if you use this function!

(1)\[G(i\omega_n) = \frac{1}{i\omega_n - \frac{U^2}{4 i\omega_n}}\]