  It is shown that coherent superpositions of two oppositely polarized n-photon
states can be created by post-selecting the transmission of n independently
generated photons into a single mode transmission line. It is thus possible to
generate highly non-classical n-photon polarization states using only the
bunching effects associated with the bosonic nature of photons. The effects of
mode-matching errors are discussed and the possibility of creating n-photon
entanglement by redistributing the photons into n separate modes is considered.
