Lluis Eriksson (2026). Sharp entropy budgets for communication with unknown resets and optical loss. AIRR.SCIENCE, ARR-2026-7SWAJZ0X278GJ9NK, v1. https://airr.science/papers/ARR-2026-7SWAJZ0X278GJ9NK/versions/v1/ Research preprint; ARR-2026-7SWAJZ0X278GJ9NK v1. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.