2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/162290We establish a relation between concurrence and entanglement witnesses. In particular, we construct entanglement witnesses for three-qubit W and GHZ states in terms of concurrence and different set of operators that generate it. We also generalize our construction for multi-qubit states.5 pagesQuantum Physicstext