Volume 80, Number 5, December 2007
Article Number 50005
Number of page(s) 6
Section General
Published online 29 October 2007
EPL, 80 (2007) 50005
DOI: 10.1209/0295-5075/80/50005

Levitation of spinor Bose-Einstein condensates: Macroscopic manifestation of the Franck-Condon effect

K. Nakamura1, A. Kohi1, H. Yamasaki2, V. M. Pérez-García3, 4 and V. V. Konotop3, 5

1  Department of Applied Physics, Osaka City University - Osaka 558-8585, Japan
2  Department of Physics, Waseda University - Tokyo 169-8555, Japan
3  Departamento de Matemáticas, E. T. S. Ingenieros Industriales, Universidad de Castilla-La Mancha 13071 Ciudad Real, Spain
4  Instituto de Matemática Aplicada a la Ciencia y la Ingeniería (IMACI), Universidad de Castilla-La Mancha 13071 Ciudad Real, Spain
5  Centro de Física Teórica e Computacional, Universidade de Lisboa, Complexo Interdisciplinar Avenida Professor Gama Pinto 2, Lisboa 1649-003, Portugal

received 12 June 2007; accepted in final form 8 October 2007; published December 2007
published online 29 October 2007

We study the dynamics of two-component Bose-Einstein condensates with vertically different trapping centers in the presence of an oscillating coupling field. This system provides a macroscopic analogue of the Franck-Condon effect with matter waves and shows how choosing appropriately the oscillation frequency of the coupling field leads to the levitation of the system against gravity.

03.75.Mn - Multicomponent condensates; spinor condensates.
03.75.Lm - Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations.

© Europhysics Letters Association 2007