2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90934A standard two-path interferometer fed into a linear N-port analyzer with coincidence detection of its output ports is analyzed. The N-port is assumed to be implemented as a discrete Fourier transformation $\cal F$, i.e., to be balanced. For unbound bosons it allows us to detect N-particle interference patterns with an N-fold reduction of the observed de Broglie wavelength, perfect visibility and minimal noise. Because the scheme involves heavy filtering a lot of the signal is lost, yet, it is surprisingly robust against common experimental imperfections, and can be implemented with current technology.4 pages, 2 figuresQuantum Physicstext