Gapped solitons and periodic excitations in strongly coupled BECs

作者：Roy Utpal^*; Shah B; Abhinav Kumar; Panigrahi P K

来源：Journal of Physics B: Atomic, Molecular and Optical Physics , 2011, 44(3): 035302.

DOI：10.1088/0953-4075/44/3/035302

It is found that localized solitons in the strongly coupled cigar-shaped Bose-Einstein condensates (BECs), in the repulsive domain, form two distinct classes. The one without a background is an asymptotically vanishing, localized soliton, having a wave number, which has a lower bound in magnitude. Periodic soliton trains exist only in the presence of a background, where the localized soliton has a W-type density profile. This soliton is well suited for trapping of neutral atoms and is found to be stable under Vakhitov-Kolokolov criterion, as well as numerical evolution. We identify an insulating phase of this system in the presence of an optical lattice. It is demonstrated that the W-type density profile can be precisely controlled through trap dynamics.

• 出版日期2011-2-14