Collective Excitations of a "Gravitationally" Self-Bound Bose Gas

Preprint

19 January 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0101310

Abstract

We investigate the collective excitations of an atomic Bose-Einstein condensate in the self-binding regime produced by electromagnetically induced ``gravity'' (1/r attraction). Analytical expressions for the frequencies of the monopole and quadrupole modes are obtained at zero temperature, using the sum-rule approach, and compared with the exact results available in the Thomas-Fermi limit. The low-energy dynamics of such condensates is shown to be dominated by the effective ``plasma'' frequency. An analog of the Jeans gravitational instability is analyzed.

Keywords

COLLECTIVE EXCITATIONS
GRAVITATIONALLY
RULE APPROACH
CONDENSATES
BOUND BOSE
BOSE GAS
GRAVITY
THOMAS

All Related Versions

Version 1, 2001-01-19, ArXiv
Published version: Europhysics Letters, 56 (1), 1.

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