Nicolas Tancogne-Dejean requested to merge transient_magnon into develop Dec 15, 2020

Description

Add the possibility to subtract a reference magnetization for transient magnon spectroscopy.

News snippet

Add the possibility to subtract a reference magnetization for transient magnon spectroscopy.

Checklist

I have checked that my code follows the Octopus coding standards
I have added tests for all the new features added in this request.