Figure 1: Schematic representation of a tritter and related bosonic coalescence.
From: Three-photon bosonic coalescence in an integrated tritter
(a) Optical scheme for a three-mode splitter obtained by a set of conventional beam splitters (grey cubes) and phase shifters (green plates)12,17, where ki with i=1,2,3 represent input–output spatial modes. (b) Integrated three-dimensional scheme for a laser-written tritter. (c) Three-photon bosonic coalescence effect in a tritter when each photon is injected into a different input spatial mode: all the terms with two photons exiting on the same output port vanish due to bosonic coalescence.
