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, and A. R. Bishop
Phys. Rev. A 75, 055601 – Published 8 May 2007
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    Abstract

    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.

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    • Received 18 January 2007

    DOI:https://doi.org/10.1103/PhysRevA.75.055601

    ©2007 American Physical Society

    Authors & Affiliations

    H. Susanto1, P. G. Kevrekidis1, R. Carretero-González2, B. A. Malomed3, D. J. Frantzeskakis4, and A. R. Bishop5

    • 1Department of Mathematics and Statistics, University of Massachusetts, Amherst, Massachusetts 01003-4515, USA
    • 2Nonlinear Dynamical Systems Group, Department of Mathematics and Statistics, and Computational Science Research Center, San Diego State University, San Diego, California, 92182-7720, USA
    • 3Department of Interdisciplinary Studies, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
    • 4Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 15784, Greece
    • 5Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

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    Vol. 75, Iss. 5 — May 2007

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