Concatenated beam splitters, optical feed-forward and the nonlinear sign gate
arXiv:quant-ph/0606217 · doi:10.1103/PhysRevA.74.064304
Abstract
We consider a nonlinear sign gate implemented using a sequence of two beam splitters, and consider the use of further sequences of beam splitters to implement feed-forward so as to correct an error resulting from the first beam splitter. We obtain similar results to Scheel et al. [Scheel et al., Phys. Rev. A 73, 034301 (2006)], in that we also find that our feed-forward procedure is only able to produce a very minor improvement in the success probability of the original gate.
4 pages, revtex4, 2 eps figures