Solitons in two-dimensional Bose-Einstein condensates

Anno: 2008

Autori: Tsuchiya S., Dalfovo F., Pitaevskii L.

Affiliazione autori: Department of Physics, Keio University, Hiyoshi, Kohoku-ku, Yokohama Japan;
CREST(JST), Honcho, Saitama, Japan;
CNR INFM-BEC;
Dipartimento di Fisica, Universita’ di Trento;
Kapitza Institute for Physical Problems, Moscow, Russia

Abstract: The excitations of a two-dimensional (2D) Bose-Einstein condensate in the presence of a soliton are studied by solving the Kadomtsev-Petviashvili equation which is valid when the velocity of the soliton approaches the speed of sound. The excitation spectrum is found to contain states which are localized near the soliton and have a dispersion law similar to the one of the stable branch of transverse oscillations of a 1D gray soliton in a 2D condensate. By using the stabilization method we show that these localized excitations behave as resonant states coupled to the continuum of free excitations of the condensate.

Giornale/Rivista: PHYSICAL REVIEW A

Volume: 77 (4)      Da Pagina: 045601-1  A: 045601-10

Parole chiavi: Ultracold gases; BEC;
DOI: 10.1103/PhysRevA.77.045601

Citazioni: 33
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-14
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