2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/141213We show that the N-photon states produced by interference between laser light and downconverted light at the input of a two path interferometer can be characterized by a single tuning parameter that describes a transition from phase squeezing to nearly maximal path entanglement and back. The quantum states are visualized on a sphere using the analogy between N-photon interference and the spin-N/2 algebra.6 pages, including 6 figures, contribution to the proceedings of QIT17, held November 21st to 22nd 2007 in OkayamaQuantum Physicstext