Stability and excitations of solitons in 2D Bose-Einstein condensates

Year: 2007

Authors: Tsuchiya S., Dalfovo F., Tozzo C., Pitaevskii L.

Autors Affiliation: CNR-INFM BEC;
Physics Department, University of Trento;
Scuola Normale Superiore, Pisa;
Kapitza Institute for Physical Problems, Moscow, Russia

Abstract: The small oscillations of solitons in 2D Bose-Einstein condensates are investigated by solving the Kadomtsev-Petviashvili equation which is valid when the velocity of the soliton approaches the speed of sound. We show that the soliton is stable and that the lowest excited states obey the same dispersion law as the one of the stable branch of excitations of a 1D gray soliton in a 2D condensate. The role of these states in thermodynamics is discussed.


Volume: 148 (3-4)      Pages from: 393  to: 398

KeyWords: Ultracold gases; BEC;
DOI: 10.1007/s10909-007-9400-3

Citations: 4
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