We propose a scalable method for implementing linear optics quantum
computation using the "linked-state" approach. Our method avoids the
two-dimensional spread of errors occurring in the preparation of the
linked-state. Consequently, a proof is given for the scalability
of this modified linked-state model, and an exact expression for
the efficiency of the method is obtained. Moreover, a considerable improvement in the efficiency is achieved. The proposed method is applicable to the "cluster-state" approach as well.