2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/127336An interesting analogy between quantum entangled states and topological links was suggested by Aravind. In particular, he emphasized a connection between the Greenberger-Horne-Zeilinger (GHZ) state and the Borromean rings. However, he made the connection in a way that depends on the choice of measurement basis. We reconsider it in a basis-independent way by using the reduced density matrix.Proceedings of the International Workshop on "Knot Theory for Scientic Objects" held in Osaka (Japan), March 8-10, 2006. 10 pages, 5 figuresQuantum Physicstext