Landau Zener scenario in a trapped atomic gas: multi-level multi-particle model Lukong Cornelius Fai, Martin Tchoffo and Michael Nana Jipdi Eur. Phys. J. B, 88 7 (2015) 181 Published online: 13 July 2015 DOI: 10.1140/epjb/e2015-60348-2