Hong–Ou–Mandel interference without beam splitters

摘要: We propose a new interferometric setup which displays completely destructive generalized N-photon Hong–Ou–Mandel interference. The key property of this scheme is that it does not require any optical elements like beam splitters or integrated waveguide structures. interference intrinsically produced by the evolution N photons in free space when emitted identical single photon sources and measured detectors far field. In sense, most simple natural implementation effect, i.e. multi-photon independent incoherent sources.