Oblique dark solitons in supersonic flow of a Bose-Einstein condensate.
In the framework of the Gross-Pitaevskii mean field approach, it is shown that the supersonic flow of a Bose-Einstein condensate can support a new type of pattern--an oblique dark soliton. The corresponding exact solution of the Gross-Pitaevskii equation is obtained. It is demonstrated by numerical simulations that oblique solitons can be generated by an obstacle inserted into the flow.
El
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Department of Mathematical Sciences, Loughborough University, Loughborough LE11 3TU, United Kingdom. G.El@lboro.ac.uk
Gammal
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Kamchatnov
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