A nonadiabatic semi-classical method for dynamics of atoms in optical lattices S. Jonsell, C. M. Dion, M. Nylén, S. J.H. Petra, P. Sjölund and A. Kastberg Eur. Phys. J. D, 39 1 (2006) 67-74 Published online: 11 April 2006 DOI: 10.1140/epjd/e2006-00082-6