The effect of the energy bias on self-trapping of Fermi superfluid gases in deep BEC regime W.Y. Wang, W.S. Duan, J.A. Sun and Y. Yang Eur. Phys. J. B, 84 2 (2011) 283-287 Published online: 31 October 2011 DOI: 10.1140/epjb/e2011-20789-1