Macroscopic oscillations between two weakly coupled Bose-Einstein condensates - Smerzi, A.; Trombettoni, A.; Lopez-Arias, T.; Fort, C.; Maddaloni, P.; Minardi, F.; Inguscio, M. (Springer, 2003)
http://dx.doi.org/10.1140/epjb/e2003-00055-1
Keywords: U