2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219670We propose a simple scheme for expanding a polarization-entangled W state. By mixing a single photon and one of the photons in an n-photon W state at a polarization-dependent beam splitter (PDBS), we can obtain an (n+1)-photon W state after post-selection. Our scheme also opens the door for generating n-photon W states using single photons and linear optics.3 pages, 2 figuresQuantum Physicstext