Phase diagram for the Grover algorithm with static imperfections A. A. Pomeransky, O. V. Zhirov and D. L. Shepelyansky Eur. Phys. J. D, 31 1 (2004) 131-135 Published online: 31 August 2004 DOI: 10.1140/epjd/e2004-00113-4