We show a simulation of quantum random walks (QRWs) 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. Feynman diagrams are used to intuitively explain the unique multiphoton interference effects of these QRWs.
© 2013 Optical Society of America
Original Manuscript: November 12, 2012
Revised Manuscript: April 19, 2013
Manuscript Accepted: April 22, 2013
Published: May 13, 2013
Bryan T. Gard, Robert M. Cross, Petr M. Anisimov, Hwang Lee, and Jonathan P. Dowling, "Quantum random walks with multiphoton interference and high-order correlation functions," J. Opt. Soc. Am. B 30, 1538-1545 (2013)