These repositories contain the classes extending the codes GRChombo and GRTresna from the GRTL collaboraion to the case of complex scalar fields emerging from non-linear sigma models. The files given here are to be complemented with the source codes that can be found on the GRTL cllaboration GitHub https://github.com/GRTLCollaboration.
The code is referenced as https://doi.org/10.5281/zenodo.16928575