2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/142547In this paper a notion of entropy transmission of quantum channels is introduced as a natural extension of Ohya's entropy. Here by quantum channel is meant unital completely positive mappings (ucp) of $B(H)$ into itself, where $H$ is an infinite dimensional Hilbert space. Using a representation theorem of ucp mapping we associate to every ucp map a uniquely determined state, and prove that entropy of ucp map is less then Ohya's entropy of the associated state.11 pages. Applied Math. & Inform. Sciences (in accepted)Quantum Physicstext