Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcp.2006.01.020
Title: An efficient and spectrally accurate numerical method for computing dynamics of rotating Bose-Einstein condensates
Authors: Bao, W. 
Wang, H. 
Keywords: Angular momentum rotation
Gross-Pitaevskii equation
Rotating Bose-Einstein condensates
Time spitting
Issue Date: 20-Sep-2006
Citation: Bao, W., Wang, H. (2006-09-20). An efficient and spectrally accurate numerical method for computing dynamics of rotating Bose-Einstein condensates. Journal of Computational Physics 217 (2) : 612-626. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcp.2006.01.020
Abstract: In this paper, we propose an efficient and spectrally accurate numerical method for computing the dynamics of rotating Bose-Einstein condensates (BEC) in two dimensions (2D) and 3D based on the Gross-Pitaevskii equation (GPE) with an angular momentum rotation term. By applying a time-splitting technique for decoupling the nonlinearity and properly using the alternating direction implicit (ADI) technique for the coupling in the angular momentum rotation term in the GPE, at every time step, the GPE in rotational frame is decoupled into a nonlinear ordinary differential equation (ODE) and two partial differential equations with constant coefficients. This allows us to develop new time-splitting spectral methods for computing the dynamics of BEC in a rotational frame. The new numerical method is explicit, unconditionally stable, and of spectral accuracy in space and second-order accuracy in time. Moreover, it is time reversible and time transverse invariant, and conserves the position density in the discretized level if the GPE does. Extensive numerical results are presented to confirm the above properties of the new numerical method for rotating BEC in 2D and 3D. © 2006 Elsevier Inc. All rights reserved.
Source Title: Journal of Computational Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/102827
ISSN: 00219991
DOI: 10.1016/j.jcp.2006.01.020
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