chi0q_from_chi0r

Synopsis:

triqs_tprf::chi_wnk_t chi0q_from_chi0r (triqs_tprf::chi_wnr_cvt chi_wnr)

Fourier transform of the generalized susceptibility \(\chi^{(0)}_{\bar{a}b\bar{c}d}(\omega, \nu, \mathbf{r})\) in real space to \(\chi^{(0)}_{\bar{a}b\bar{c}d}(\omega, \nu, \mathbf{q})\) in momentum space.

Parameters

• chi_wnr: Generalized susceptibility \(\chi^{(0)}_{\bar{a}b\bar{c}d}(\omega, \nu, \mathbf{r})\) in one bosonic and one fermionic Matsuabara frequency and real space.

Return value

Generalized susceptibility \(\chi^{(0)}_{\bar{a}b\bar{c}d}(\omega, \nu, \mathbf{q})\) in one bosonic and one fermionic Matsuabara frequency and momentum space.

Documentation

Computes

(1)\[\chi^{(0)}_{\bar{a}b\bar{c}d}(\omega, \nu, \mathbf{q}) = \mathcal{F}_{\mathbf{r} \rightarrow \mathbf{q}} \left\{ \chi^{(0)}_{\bar{a}b\bar{c}d}(\omega, \nu, \mathbf{r}) \right\}\]