Similarities and Differences Between Two-Particle and Three-Particle Interference
Daniel M. Greenberger, Michael Horne, Anton Zeilinger · Fortschritte der Physik · 2000
We illustrate various methods for implementing experiments that split particles into three beams, using “tritters”, or use three coherent particles (GHZ states), in order to illustrate our belief that any experiment that can be done using two particles is more interesting with three partricles.