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Journal of Low Temperature Physics

, Volume 150, Issue 3–4, pp 630–635 | Cite as

Ground-State Properties and Collective Excitations in a  2D Bose-Einstein Condensate with Gravity-Like Interatomic Attraction

  • A. Keleş
  • S. Sevinçli
  • B. TanatarEmail author
Article
  • 52 Downloads

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 systems Excitations in quantum systems 

PACS

03.75.Fi 04.40.-b 34.20.Cf 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of PhysicsBilkent UniversityAnkaraTurkey

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