Published May 2009
| Version v1
Journal article
Stability of a Bose-Einstein condensate in an anharmonic trap
- 1. Department of Physics, Lady Brabourne College, P-1/2 Suhrawardy Avenue, Calcutta 700017 (India)
- 2. Department of Physics, University of Calcutta, 92 A.P.C. Road, Calcutta 700009 (India)
- 3. Santoshpur Sri Gouranga Vidyapith (H.S.), P.O. Kulitapara, Howrah 711312 (India)
Description
We study the stability of Bose-Einstein condensate (BEC) with repulsive and attractive interatomic interactions in a harmonic plus quartic trap [V(r)=(1/2)mω2r2+λr4]. We find that BEC with repulsive interaction becomes more stable for λ>0. For λ<0, we observe a different metastability of the condensate even when the scattering length is positive. For BEC with attractive interaction, we observe dramatic change in the stability factor (Acr|asc|/aho) due to the anharmonicity. The frequencies of the collective excitations are also modified by the atomic interaction and by the anharmonicity.
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review. A
- Journal Volume
- 79
- Journal Issue
- 5
- Journal Page Range
- p. 053629-053629.7
- ISSN
- 1050-2947
- CODEN
- PLRAAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41048834
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- BOSE-EINSTEIN CONDENSATION; COLLECTIVE EXCITATIONS; INTERACTIONS; RADIATION PRESSURE; SCATTERING LENGTHS; STABILITY; TRAPS
- Descriptors DEC
- DIMENSIONS; ENERGY-LEVEL TRANSITIONS; EXCITATION; LENGTH
Optional Information
- Notes
- (c) 2009 The American Physical Society