Period doubling, two-color lattices, and the growth of swallowtails in Bose-Einstein condensates

B. T. Seaman, L. D. Carr, M. J. Holland

The band structure of a Bose-Einstein condensate is studied for lattice traps of sinusoidal, Jacobi elliptic, and Kronig-Penney form. It is demonstrated that the physical propertie…