Utilizing Encoding in Scalable Linear Optics Quantum Computing
  We present a scheme which offers a significant reduction in the resources required to implement linear optics quantum computing. The scheme is a variation of the proposal of Knill, Laflamme, and Milburn, and makes use of an incremental approach to the error encoding to boost probability of success. 
A. J. F. Hayes, A. Gilchrist, C. R. Myers and T. C. Ralph