At present, the Wigner transform of the self-energies is calculated multiple times, and the calculations are not localized in energy, i.e. the result for any energy depends on the entire energy grid used.
An improvement would be to calculate the transforms only once in a way that is independent of the grid. From that calculations, interpolations can be made to off-grid points.
There may additionally be bugs in the current calculation. This should be looked at.
At present, the Wigner transform of the self-energies is calculated multiple times, and the calculations are not localized in energy, i.e. the result for any energy depends on the entire energy grid used.
An improvement would be to calculate the transforms only once in a way that is independent of the grid. From that calculations, interpolations can be made to off-grid points.
There may additionally be bugs in the current calculation. This should be looked at.