Breathing Bright Solitons in a Bose–Einstein Condensate
Chong Gui-Shu, Hai Wen-Hua, Qiongtao Xie
A Bose–Einstein condensate with time varying scattering length in time-dependent harmonic trap is analytically investigated and soliton-like solutions of the Gross–Pitaeviskii equation are obtained to describe single soliton, bisoliton and N -soliton properties of the matter wave. The influences of the geometrical property and modulate frequency of trapping potential on soliton behaviour are discussed. When the trap potential has a very small trap aspect ratio or oscillates with a high frequency, the matter wave preserves its shape nearly like a soliton train in propagation, while the breathing behaviour, which displays the periodic collapse and revival of the matter wave, is found for a relatively large aspect ratio or slow varying potential. Meanwhile mass centre of the matter wave translates and/or oscillates for different trap aspect ratio and trap frequencies.
Chinese Physics Letters•Dec 1, 2003•37 citations