Landau and dynamical instabilities of the superflow of Bose-Einstein condensates in optical lattices - art. no. 061603

Authors
Citation
B. Wu et Q. Niu, Landau and dynamical instabilities of the superflow of Bose-Einstein condensates in optical lattices - art. no. 061603, PHYS REV A, 6406(6), 2001, pp. 1603
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
1050-2947 → ACNP
Volume
6406
Issue
6
Year of publication
2001
Database
ISI
SICI code
1050-2947(200112)6406:6<1603:LADIOT>2.0.ZU;2-H
Abstract
The superfluidity of Bose-Einstein condensates (BECs) in optical lattices i s investigated. Apart from the usual Landau instability, which occurs when a BEC flows faster than the speed of sound, the BEC can also suffer a dynam ical instability, resulting in period doubling and other sorts of symmetry breaking of the system. Such an instability plays a crucial role in the dis sipative motion of a trapped BEC in an optical lattice recently observed.