Dilute Bose-Einstein condensate in a trap: Characteristic lengths and critical velocities

Authors
Fetter, AL
Citation
Al. Fetter, Dilute Bose-Einstein condensate in a trap: Characteristic lengths and critical velocities, INT J MOD B, 13(5-6), 1999, pp. 643-649
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
ISSN journal
02179792 → ACNP
Volume
13
Issue
5-6
Year of publication
1999
Pages
643 - 649
Database
ISI
SICI code
0217-9792(19990310)13:5-6<643:DBCIAT>2.0.ZU;2-Q
Abstract
The Bogoliubov approximation and the Gross-Pitaevskii equation characterize the effect of repulsive interactions on a dilute ideal Bose-Einstein gas i n a spherical harmonic trap. For large N, the interactions expand the conde nsate relative to an ideal Bose gas; both the speed of sound and critical a ngular velocity Omega(c1) for creation of a quantized vortex depend crucial ly on the interparticle repulsion through the coherence length xi.