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- W1992188873 abstract "Dark soliton states of Bose-Einstein condensates in harmonic traps are studied both analytically and computationally by the direct solution of the Gross-Pitaevskii equation in three dimensions. The ground and self-consistent excited states are found numerically by relaxation in imaginary time. The energy of a stationary soliton in a harmonic trap is shown to be independent of density and geometry for large numbers of atoms. Large-amplitude field modulation at a frequency resonant with the energy of a dark soliton is found to give rise to a state with multiple vortices. The Bogoliubov excitation spectrum of the soliton state contains complex frequencies, which disappear for sufficiently small numbers of atoms or large transverse confinement. The relationship between these complex modes and the snake instability is investigated numerically by propagation in real time." @default.
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- W1992188873 date "2000-10-19" @default.
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- W1992188873 title "Dark-soliton states of Bose-Einstein condensates in anisotropic traps" @default.
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- W1992188873 doi "https://doi.org/10.1103/physreva.62.053606" @default.
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