2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89288This paper presents properties of the so-called quasi-Bell states: entangled states written as superpositions of nonorthogonal states. It is shown that a special class of those states, namely entangled coherent states, are more robust against decoherence due to photon absorption than the standard bi-photon Bell states.13 pages, 1 figure. Submitted to J of Physics AQuantum Physicstext