Ground-state properties and collective excitations in a 2D Bose-Einstein condensate with gravity-like interatomic attraction
Author
Keleş, Ahmet
Sevinçli, Sevilay
Tanatar, Bilal
Date
2008Source Title
Journal of Low Temperature Physics
Print ISSN
0022-2291
Publisher
Springer
Volume
150
Issue
3-4
Pages
630 - 635
Language
English
Type
Conference PaperItem Usage Stats
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Abstract
We study the ground-state properties of a Bose-Einstein condensate (BEC) with the short-range repulsion and gravitylike 1/r interatomic attraction in two-dimensions (2D). Using the variational approach, we obtain the ground-state energy and show that the condensate is stable for all interaction strenghts in 2D. We also determine the collective excitations at zero temperature using the time-dependent variational method. We analyze the properties of the Thomas-Fermi-gravity (TF-G) and gravity (G) regimes.
Keywords
Cold atom Bose and Fermi systemsExcitations in quantum systems
Interaction strenght
Interatomic attraction
Atomic physics
Excitation energy
Gravitation
Ground state
Bose-Einstein condensation