Pressure drag in linear and nonlinear quantum fluids

Authors
Winiecki, T McCann, JF Adams, CS
Citation
T. Winiecki et al., Pressure drag in linear and nonlinear quantum fluids, PHYS REV L, 82(26), 1999, pp. 5186-5189
Citations number
10
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
82
Issue
26
Year of publication
1999
Pages
5186 - 5189
Database
ISI
SICI code
0031-9007(19990628)82:26<5186:PDILAN>2.0.ZU;2-6
Abstract
We study the Bow of a weakly interacting Bose-Einstein condensate around an obstacle by numerical solution of the Gross-Pitaevskii equation. We observ e vortex emission and the formation of bow waves leading to pressure drag. We compare the drag law with that of an ideal Bose gas, and show that inter actions reduce the drag force. This reduction can be explained in terms of a "collisional screening" of the obstacle.