Eur. Phys. J. D 65, 219-222 (2011)
https://doi.org/10.1140/epjd/e2011-20253-6

Regular Article

Dipolar drag in bilayer harmonically trapped gases

Dipartimento di Fisica, Università di Trento and INO-CNR BEC Center, 38123 Povo, Italy

^a e-mail: recati@science.unitn.it

Received: 2 May 2011
Received in final form: 25 July 2011
Published online: 4 October 2011

Abstract

We consider two separated pancake-shaped trapped gases interacting with a dipolar (either magnetic or electric) force. We study how the center of mass motion propagates from one cloud to the other as a consequence of the long-range nature of the interaction. The corresponding dynamics is fixed by the frequency difference between the in-phase and the out-of-phase center of mass modes of the two clouds, whose dependence on the dipolar interaction strength and the cloud separation is explicitly investigated. We discuss Fermi gases in the degenerate as well as in the classical limit and comment on the case of Bose-Einstein condensed gases.