Issue |
EPL
Volume 89, Number 5, March 2010
|
|
---|---|---|
Article Number | 53001 | |
Number of page(s) | 5 | |
Section | Atomic, Molecular and Optical Physics | |
DOI | https://doi.org/10.1209/0295-5075/89/53001 | |
Published online | 26 March 2010 |
Driven collective instabilities in magneto-optical traps: A fluid-dynamical approach
1
CFIF, Instituto Superior Técnico - Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal, EU
2
IPFN, Instituto Superior Técnico - Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal, EU
3
Institut Non Linéaire de Nice, UMR 6618 - 1361 Route des Lucioles, F-06560 Valbonne, France, EU
Corresponding author: htercas@cfif.ist.utl.pt
Received:
20
January
2010
Accepted:
2
March
2010
We present a theoretical model to describe an instability mechanism in ultra-cold gases, where long-range interactions are taken into account. Focusing on the coupling between the collective (plasma-like) and the center-of-mass modes, we show that the resulting dynamics is governed by a parametric equation of the generalized Mathieu type and compute the corresponding stability chart. We apply our model to typical ranges of magneto-optical traps (MOT) parameters and find a good agreement with previous experimental observations.
PACS: 37.10.Gh – Atom traps and guides / 37.10.Vz – Mechanical effects of lights on atoms, molecules, and lons / 52.35.Dm – Sound waves
© EPLA, 2010
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