Parametric excitation of solitons in dipolar Bose Einstein condensates

Benseghir, A and Wan Abdullah, Wan Ahmad Tajuddin and Umarov, Bakhram and Baizakov, Bakhtiyor B (2013) Parametric excitation of solitons in dipolar Bose Einstein condensates. Modern Physics Letters B, 27 (25). 1350184(1)-350184(12). ISSN 1793-6640 (O), 0217-9849 (P)

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Abstract

In this paper, we study the response of a Bose–Einstein condensate with strong dipole–dipole atomic interactions to periodically varying perturbation. The dynamics is governed by the Gross–Pitaevskii equation with additional nonlinear term, corresponding to a nonlocal dipolar interactions. The mathematical model, based on the variational approximation, has been developed and applied to parametric excitation of the condensate due to periodically varying coefficient of nonlocal nonlinearity. The model predicts the waveform of solitons in dipolar condensates and describes their small amplitude dynamics quite accurately. Theoretical predictions are verified by numerical simulations of the nonlocal Gross–Pitaevskii equation and good agreement between them is found. The results can lead to better understanding of the properties of ultra-cold quantum gases, such as 52Cr, 164Dy and 168Er, where the long-range dipolar atomic interactions dominate the usual contact interactions.

Item Type:	Article (Journal)
Additional Information:	3938/32223
Uncontrolled Keywords:	Bose–Einstein condensate; dipolar interactions; matter-wave soliton; shape oscillations; variational approach
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science
Depositing User:	Dr Bakhram Umarov
Date Deposited:	04 Oct 2013 09:37
Last Modified:	04 Oct 2013 09:37
URI:	http://irep.iium.edu.my/id/eprint/32223

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