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Title: Nonlinear Bose-Einstein-condensate dynamics induced by a harmonic modulation of the s-wave scattering length

Abstract

In a recent experiment, a Bose-Einstein condensate of {sup 7}Li has been excited by a harmonic modulation of the atomic s-wave scattering length via Feshbach resonance. By combining an analytical perturbative approach with extensive numerical simulations, we analyze the emerging nonlinear dynamics of the system on the mean-field Gross-Pitaevskii level at zero temperature. Resulting excitation spectra are presented and prominent nonlinear features are found: mode coupling, higher harmonics generation, and significant shifts in the frequencies of collective modes. We indicate how nonlinear dynamical properties could be made clearly observable in future experiments and compared to our results.

Authors:
;  [1];  [2];  [3];  [4]
  1. Scientific Computing Laboratory, Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade (Serbia)
  2. Institut fuer Theoretische Physik, Freie Universitaet Berlin, Arnimallee 14, D-14195 Berlin (Germany)
  3. Fachbereich Physik, Universitaet Duisburg-Essen, Lotharstrasse 1, D-47048 Duisburg (Germany)
  4. (Germany)
Publication Date:
OSTI Identifier:
22058751
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; BOSE-EINSTEIN CONDENSATION; COMPUTERIZED SIMULATION; EXCITATION; HARMONICS; LITHIUM 7; MEAN-FIELD THEORY; MODULATION; NONLINEAR PROBLEMS; S WAVES; SCATTERING LENGTHS; SPECTRA

Citation Formats

Vidanovic, Ivana, Balaz, Antun, Al-Jibbouri, Hamid, Pelster, Axel, and Fachbereich Physik, Universitaet Bielefeld, Universitaetsstrasse 25, D-33501 Bielefeld. Nonlinear Bose-Einstein-condensate dynamics induced by a harmonic modulation of the s-wave scattering length. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.013618.
Vidanovic, Ivana, Balaz, Antun, Al-Jibbouri, Hamid, Pelster, Axel, & Fachbereich Physik, Universitaet Bielefeld, Universitaetsstrasse 25, D-33501 Bielefeld. Nonlinear Bose-Einstein-condensate dynamics induced by a harmonic modulation of the s-wave scattering length. United States. doi:10.1103/PHYSREVA.84.013618.
Vidanovic, Ivana, Balaz, Antun, Al-Jibbouri, Hamid, Pelster, Axel, and Fachbereich Physik, Universitaet Bielefeld, Universitaetsstrasse 25, D-33501 Bielefeld. Fri . "Nonlinear Bose-Einstein-condensate dynamics induced by a harmonic modulation of the s-wave scattering length". United States. doi:10.1103/PHYSREVA.84.013618.
@article{osti_22058751,
title = {Nonlinear Bose-Einstein-condensate dynamics induced by a harmonic modulation of the s-wave scattering length},
author = {Vidanovic, Ivana and Balaz, Antun and Al-Jibbouri, Hamid and Pelster, Axel and Fachbereich Physik, Universitaet Bielefeld, Universitaetsstrasse 25, D-33501 Bielefeld},
abstractNote = {In a recent experiment, a Bose-Einstein condensate of {sup 7}Li has been excited by a harmonic modulation of the atomic s-wave scattering length via Feshbach resonance. By combining an analytical perturbative approach with extensive numerical simulations, we analyze the emerging nonlinear dynamics of the system on the mean-field Gross-Pitaevskii level at zero temperature. Resulting excitation spectra are presented and prominent nonlinear features are found: mode coupling, higher harmonics generation, and significant shifts in the frequencies of collective modes. We indicate how nonlinear dynamical properties could be made clearly observable in future experiments and compared to our results.},
doi = {10.1103/PHYSREVA.84.013618},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}