Čerenkov-like radiation in a binary superfluid flow past an obstacle

H. Susanto, P. G. Kevrekidis, R. Carretero-González, B. A. Malomed, D. J. Frantzeskakis, A. R. Bishop

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28 Scopus citations


We consider the dynamics of two coupled miscible Bose-Einstein condensates, when an obstacle is dragged through them. The existence of two different speeds of sound provides the possibility for three dynamical regimes: when both components are subcritical, we do not observe nucleation of coherent structures; when both components are supercritical they both form dark solitons in one dimension (1D) and vortices or rotating vortex dipoles in two dimensions; in the intermediate regime, we observe the nucleation of a structure in the form of a dark-antidark soliton in 1D; the 2D analog of such a structure, a vortex-lump, is also observed.

Original languageBritish English
Article number055601
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
StatePublished - 8 May 2007


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