Emission of Solitons From an Obstacle Moving in the Bose-Einstein Condensate

Abstract

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Dark solitons dynamically generated from a potential moving in a one-dimensional Bose-Einstein condensate are displayed. Based on numerical simulations of the Gross-Pitaevskii equation, we find that the moving obstacle successively emits a series of solitons which propagate at constant speeds. The dependence of soliton emission on the system parameters is examined. The formation mechanism of solitons is interpreted as interference between a diffusing wavepacket and the condensate background, enhanced by the nonlinear interactions.PACS numbers: 03.75.Mn, 03.75.Lm, 05.30.Jp

Keywords

• emission of solitons
• moving obstacle
• one-dimensional Bose-Einstein condensate
• numerical simulations
• interference