Multiport beam-splitter controlled transformations with postselection of superposition single-photon states

Two components of superposition single-photon state are entering into two different ports of multiport interferometer Interference effects in which the inputs into the interferometer are controlling the outputs are studied In particular we study a multiport beam-splitter (BS) configuration, in which eight input operators a(0), a(1), a(2) a(7) are mixed by 12 BS's to produce the output operators b(0), b(1), b(2), .b(7) Multiport beam-splitter transformations of superposition single-photon states are analyzed with a possible use of postselection effects (C) 2010 Elsevier B.V. All rights reserved