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(De)coherence physics with condensates in microtraps.

Henkel, C. and Gardiner, S.A. and Negretti, A. (2004) '(De)coherence physics with condensates in microtraps.', Laser physics., 14 (4). pp. 615-620.

Abstract

We discuss the dynamics of a condensate in a miniaturized electromagnetic trap formed above a microstructured substrate. Recent experiments have found that trap lifetimes get reduced when approaching the substrate because atoms couple to thermally excited near fields. The data agree quantitatively with our theory [Appl. Phys. B 69, 379 (1999)]. We focus on the decoherence of a quantum degenerate gas in a quasi-one- dimensional trap. Monte Carlo simulations indicate that atom interactions reduce the condensate decoherence rate. This is explained by a simple theory in terms of the suppression of long-wavelength excitations. We present preliminary simulation results for the adiabatic generation of dark solitons.

Item Type:Article
Full text:PDF - Published Version (213Kb)
Status:Peer-reviewed
Publisher Web site:http://www.maik.ru/cgi-bin/search.pl?type=abstract&name=lasphys&number=4&year=4&page=615
Record Created:30 Jun 2010 10:50
Last Modified:19 Nov 2010 10:39

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