Repair a scientific finite-temperature workflow
This task contains a pinned snapshot of the open-source Spinach spin-dynamics library and an offline scientific reproduction. A finite-temperature relaxation experiment produces an unexpected result: a state calculated as thermal equilibrium can drift under the corresponding relaxation dynamics, and equivalent Liouville-space representations can disagree about the same physical experiment.
Investigate the issue as a scientific-software problem. Read the supplied scientific context, run the reproduction, and inspect the surrounding source behavior before editing. Repair the implementation so that the physical behavior of the workflow is restored without changing the public API.
The goal is one coherent repair, not a fixture-specific workaround. Preserve the scientific meaning of the workflow outside the displayed experiment and do not hard-code its inputs, dimensions, or reported categories.
Run the public reproduction with:
python reproduce.py
Keep generated files under outputs/ and do not rely on network access,
MATLAB, or external data.