(De)coherence Physics With Condensates In Microtraps

Henkel, C.; Gardiner, S.A.; Negretti, A.

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.

Citation

Henkel, C., Gardiner, S., & Negretti, A. (2004). (De)coherence Physics With Condensates In Microtraps. Laser Physics, 14(4), 615-620

• Journal Article Type: Article
• Publication Date: Mar 1, 2004
• Deposit Date: Jun 30, 2010
• Publicly Available Date: Nov 19, 2010
• Journal: Laser Physics
• Print ISSN: 1054-660X
• Electronic ISSN: 1555-6611
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 14
• Issue: 4
• Pages: 615-620
• Public URL: https://durham-repository.worktribe.com/output/1611950
• Publisher URL: http://www.maik.ru/cgi-bin/search.pl?type=abstract&name=lasphys&number=4&year=4&page=615