Development of instability of dark solitons generated by a flow of Bose-Einstein condensate past a concave corner

2010/10/11 by Kamchatnov, A. M., Korneev, S. V.
#FOS: Physical sciences #Pattern Formation and Solitons (nlin.PS) #Quantum Gases (cond-mat.quant-gas)

paper · doi:10.48550/arxiv.1010.2100

Abstract

The stability of dark solitons generated by a supersonic flow of a Bose-Einstein condensate past a concave corner (or a wedge) is studied. It is shown that solitons in the dispersive shock wave generated at the initial moment of time demonstrate a snake instability during their evolution to stationary curved solitons. Time of decay of soliton to vortices agrees very well with analytical estimates of the instability growth rate.

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