triqs_tprf::hubbard_atom::gamma_ph_magnetic

#include <triqs_tprf/hubbard_atom.hpp>

Synopsis

g2_iw_t gamma_ph_magnetic (int nw, int nwf, double beta, double U)

Magnetic vertex function in the particle-hole channel of the Hubbard atom at half-filling \(\Gamma(\omega, \nu, \nu')\)

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

Parameters

• nw number of bosonic Matsubara frequencies
• nwf number of fermionic Matsubara frequencies
• beta inverse temperature
• U Hubbard U interaction parmeter

Returns

gamma magnetic susceptibility \(\Gamma(\omega, \nu, \nu')\)