Lluis Eriksson (2026). Capacities, strong-converse exponents and complementary simulation for qubit Davies channels. AIRR.SCIENCE, ARR-2026-5YJX444B6M95ZTG4, v3. https://airr.science/papers/ARR-2026-5YJX444B6M95ZTG4/versions/v3/ Research preprint; ARR-2026-5YJX444B6M95ZTG4 v3. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.