corner
corner
APS » Journals » Phys. Rev. A » Volume 63 » Issue 1
< Previous Article | Next Article >

Phys. Rev. A 63, 011601(R) (2000) [4 pages]

Shape deformations and angular-momentum transfer in trapped Bose-Einstein condensates

Download: PDF (65 kB) Buy this article Export: BibTeX or EndNote (RIS)

F. Dalfovo1 and S. Stringari2
1Dipartimento di Matematica e Fisica, Università Cattolica, Via Musei 41, Brescia, ItalyIstituto Nazionale per la Fisica della Materia, Unità di Brescia, Brescia, Italy
2Dipartimento di Fisica, Università di Trento, I-38050 Povo, ItalyIstituto Nazionale per la Fisica della Materia, Unità di Trento, Povo, Italy

Received 14 September 2000; published 4 December 2000

Angular momentum can be transferred to a trapped Bose-Einstein condensate by distorting its shape with an external rotating field, provided the rotational frequency is larger than a critical frequency fixed by the energy and angular momentum of the excited states of the system. By using the Gross-Pitaevskii equation and sum rules, we explore the dependence of such a critical frequency on the multipolarity of the excitations and the asymmetry of the confining potential. We also discuss its possible relevance for vortex nucleation in rotating traps.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.63.011601
DOI:
10.1103/PhysRevA.63.011601
PACS:
03.75.Fi, 05.30.Jp, 32.80.-t, 67.40.-w
 
< Previous Article | Next Article >