Volume 89, Number 5, March 2010
|Number of page(s)||5|
|Section||Atomic, Molecular and Optical Physics|
|Published online||26 March 2010|
Driven collective instabilities in magneto-optical traps: A fluid-dynamical approach
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: firstname.lastname@example.org
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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