  We show a simulation of quantum random walks with multiple photons using a
staggered array of 50/50 beam splitters with a bank of detectors at any desired
level. We discuss the multiphoton interference effects that are inherent to
this setup, and introduce one, two, and threefold coincidence detection
schemes. The use of Feynman diagrams are used to intuitively explain the unique
multiphoton interference effects of these quantum random walks.
