triqs.gf.tools.delta

triqs.gf.tools.delta(g)[source]

Compute Delta_iw from G0_iw. CAUTION: This function assumes the following properties of g

  • The diagonal components of g should decay as 1/iOmega

  • g should fullfill the property g[iw][i,j] = conj(g[-iw][j,i])

Parameters:

g (BlockGf (of GfImFreq) or GfImFreq) – Non-interacting Green’s function.

Returns:

delta_iw – Hybridization function.

Return type:

BlockGf (of GfImFreq) or GfImFreq