Scheme for n phase gates operation and one-step preparation of highly entangled cluster stateK. H. Song, Y. J. Zhao, Z. G. Shi, S. H. Xiang and X. W. ChenEur. Phys. J. D, 66 1 (2012) 1DOI: https://doi.org/10.1140/epjd/e2011-10641-3