SU(3) Quantum Interferometry with single-photon input pulses
  We develop a framework for solving the action of a three-channel passive optical interferometer on single-photon pulse inputs to each channel using SU(3) group-theoretic methods, which can be readily generalized to higher-order photon-coincidence experiments. We show that features of the coincidence plots vs relative time delays of photons yield information about permanents, immanants, and determinants of the interferometer SU(3) matrix. 
Si-Hui Tan, Yvonne Y. Gao, Hubert de Guise, and Barry C. Sanders
quant-ph math-ph math.MP