2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/143575Quantum initial state estimation through entanglement and continuous measurement is introduced. This paper provides a unified formulation of classical and quantum smoothing and shows a smoothing uncertainty relation. As an example, a communication between two parties via a two mode squeezed state is shown.9 pagesQuantum Physicstext