Ground-state properties and collective excitations in a 2D Bose-Einstein condensate with gravity-like interatomic attraction

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Ground-State properties and collective excitations in a 2D Bose-Einstein condensate with gravity-like interatomic attraction.pdf (289.56 KB)

Date

2008

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Source Title

Journal of Low Temperature Physics

Print ISSN

0022-2291

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Publisher

Springer

Volume

150

Issue

3-4

Pages

630 - 635

Language

English

Type

Conference Paper

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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.

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Keywords

Cold atom Bose and Fermi systems, Excitations in quantum systems, Interaction strenght, Interatomic attraction, Atomic physics, Excitation energy, Gravitation, Ground state, Bose-Einstein condensation

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http://hdl.handle.net/11693/26901

Published Version (Please cite this version)

http://dx.doi.org/10.1007/s10909-007-9599-z

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Scholarly Publications - Physics