triqs_tprf::chi0_from_gg2_PH

#include <triqs_tprf.hpp>

Synopsis

g2_iw_t chi0_from_gg2_PH (g_iw_vt g, g2_iw_vt g2)

Bubble susceptibility \(\chi^{(0)} = GG\) in the Particle-Hole channel

Computes

\[\chi^{(0)}_{\bar{a}b\bar{c}d}(\omega, \nu, \nu') = - \beta \delta_{\nu, \nu'} G_{da}(\nu) \cdot G_{bc}(\omega + \nu)\]

Parameters

g single particle Green’s function \(G_{ab}(\nu)\)

g2 two-particle Green’s function with the mesh to use for \(\chi^{(0)}\)

chi0 particle-hole bubble: \(\chi^{(0)}_{\bar{a}b\bar{c}d}(\omega, \nu,\nu')\)